Use -XNoImplicitPrelude and 'import Prelude' explicitly.

This is needed for ghci to work with pandoc, given that we
now use a custom prelude.

Closes #2503.

109 files changed, 118 insertions, 12 deletions

diff --git a/benchmark/benchmark-pandoc.hs b/benchmark/benchmark-pandoc.hs
index 849448feb..aa36800ca 100644
--- a/benchmark/benchmark-pandoc.hs
+++ b/benchmark/benchmark-pandoc.hs
@@ -15,6 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 -}
+import Prelude
 import Text.Pandoc
 import Criterion.Main
 import Criterion.Types (Config(..))
diff --git a/pandoc.cabal b/pandoc.cabal
index cba6d676d..feb6ea1df 100644
--- a/pandoc.cabal
+++ b/pandoc.cabal
@@ -303,7 +303,7 @@ Library
      other-modules: Text.Pandoc.Data
   if os(windows)
     Cpp-options:      -D_WINDOWS
-  Ghc-Options:   -rtsopts -Wall -fno-warn-unused-do-bind
+  Ghc-Options:   -rtsopts -Wall -fno-warn-unused-do-bind -XNoImplicitPrelude
   Ghc-Prof-Options: -fprof-auto-exported -rtsopts
   Default-Language: Haskell98
   Other-Extensions:   PatternGuards, OverloadedStrings,
@@ -420,7 +420,7 @@ Executable pandoc
      Build-Depends: network-uri >= 2.6 && < 2.7, network >= 2.6
   else
      Build-Depends: network >= 2 && < 2.6
-  Ghc-Options:   -rtsopts -with-rtsopts=-K16m -Wall -fno-warn-unused-do-bind
+  Ghc-Options:   -rtsopts -with-rtsopts=-K16m -Wall -fno-warn-unused-do-bind -XNoImplicitPrelude
   Ghc-Prof-Options: -fprof-auto-exported -rtsopts -with-rtsopts=-K16m
   if os(windows)
     Cpp-options:      -D_WINDOWS
@@ -496,7 +496,7 @@ Test-Suite test-pandoc
                   Tests.Writers.Docx
                   Tests.Writers.RST
                   Prelude
-  Ghc-Options:  -rtsopts -Wall -fno-warn-unused-do-bind -threaded
+  Ghc-Options:  -rtsopts -Wall -fno-warn-unused-do-bind -threaded -XNoImplicitPrelude
   Default-Language: Haskell98
 
 benchmark benchmark-pandoc
@@ -507,6 +507,6 @@ benchmark benchmark-pandoc
                    base >= 4.2 && < 5,
                    syb >= 0.1 && < 0.7,
                    criterion >= 1.0 && < 1.2
-  Ghc-Options:   -rtsopts -Wall -fno-warn-unused-do-bind
+  Ghc-Options:   -rtsopts -Wall -fno-warn-unused-do-bind -XNoImplicitPrelude
   Default-Language: Haskell98
   Other-Modules:   Prelude
diff --git a/pandoc.hs b/pandoc.hs
index fce1a8142..a83426bff 100644
--- a/pandoc.hs
+++ b/pandoc.hs
@@ -30,6 +30,7 @@ Parses command-line options and calls the appropriate readers and
 writers.
 -}
 module Main where
+import Prelude
 import Text.Pandoc
 import Text.Pandoc.Builder (setMeta)
 import Text.Pandoc.PDF (makePDF)
diff --git a/src/Text/Pandoc.hs b/src/Text/Pandoc.hs
index e49fef3b5..f3301d140 100644
--- a/src/Text/Pandoc.hs
+++ b/src/Text/Pandoc.hs
@@ -150,6 +150,7 @@ import Text.Pandoc.Writers.RST
 import Text.Pandoc.Writers.LaTeX
 import Text.Pandoc.Writers.ConTeXt
 import Text.Pandoc.Writers.Texinfo
+import Prelude
 import Text.Pandoc.Writers.HTML
 import Text.Pandoc.Writers.ODT
 import Text.Pandoc.Writers.Docx
diff --git a/src/Text/Pandoc/Asciify.hs b/src/Text/Pandoc/Asciify.hs
index c183458e4..a11809a00 100644
--- a/src/Text/Pandoc/Asciify.hs
+++ b/src/Text/Pandoc/Asciify.hs
@@ -30,6 +30,7 @@ ascii equivalents (used in constructing HTML identifiers).
 -}
 module Text.Pandoc.Asciify (toAsciiChar)
 where
+import Prelude
 import qualified Data.Map as M
 import Data.Char (isAscii)
 
diff --git a/src/Text/Pandoc/CSS.hs b/src/Text/Pandoc/CSS.hs
index 9d0c84243..ad0d0636a 100644
--- a/src/Text/Pandoc/CSS.hs
+++ b/src/Text/Pandoc/CSS.hs
@@ -3,6 +3,7 @@ module Text.Pandoc.CSS ( foldOrElse,
                        )
 where
 
+import Prelude
 import Text.Pandoc.Shared (trim)
 import Text.Parsec
 import Text.Parsec.String
diff --git a/src/Text/Pandoc/Compat/Directory.hs b/src/Text/Pandoc/Compat/Directory.hs
index 61dd5c525..c8f3cc047 100644
--- a/src/Text/Pandoc/Compat/Directory.hs
+++ b/src/Text/Pandoc/Compat/Directory.hs
@@ -5,7 +5,6 @@ module Text.Pandoc.Compat.Directory ( getModificationTime )
 #if MIN_VERSION_directory(1,2,0)
 import System.Directory
 
-
 #else
 import qualified System.Directory as S
 import Data.Time.Clock (UTCTime)
diff --git a/src/Text/Pandoc/Compat/Except.hs b/src/Text/Pandoc/Compat/Except.hs
index 9ce7c0d36..5c1214f47 100644
--- a/src/Text/Pandoc/Compat/Except.hs
+++ b/src/Text/Pandoc/Compat/Except.hs
@@ -9,6 +9,7 @@ module Text.Pandoc.Compat.Except ( ExceptT
                                  , catchError )
        where
 
+import Prelude
 #if MIN_VERSION_mtl(2,2,1)
 import Control.Monad.Except
 
diff --git a/src/Text/Pandoc/Compat/TagSoupEntity.hs b/src/Text/Pandoc/Compat/TagSoupEntity.hs
index 80985aef9..30889e915 100644
--- a/src/Text/Pandoc/Compat/TagSoupEntity.hs
+++ b/src/Text/Pandoc/Compat/TagSoupEntity.hs
@@ -2,6 +2,7 @@
 module Text.Pandoc.Compat.TagSoupEntity (lookupEntity
                           ) where
 
+import Prelude
 import qualified Text.HTML.TagSoup.Entity as TE
 
 lookupEntity :: String -> Maybe Char
diff --git a/src/Text/Pandoc/Error.hs b/src/Text/Pandoc/Error.hs
index 0a4e08175..04084055e 100644
--- a/src/Text/Pandoc/Error.hs
+++ b/src/Text/Pandoc/Error.hs
@@ -31,6 +31,7 @@ during parsing.
 -}
 module Text.Pandoc.Error (PandocError(..), handleError) where
 
+import Prelude
 import Text.Parsec.Error
 import Text.Parsec.Pos hiding (Line)
 import Text.Pandoc.Compat.Except
diff --git a/src/Text/Pandoc/Highlighting.hs b/src/Text/Pandoc/Highlighting.hs
index d0b945d45..40e1ec8ae 100644
--- a/src/Text/Pandoc/Highlighting.hs
+++ b/src/Text/Pandoc/Highlighting.hs
@@ -48,6 +48,7 @@ module Text.Pandoc.Highlighting ( languages
                                 , fromListingsLanguage
                                 , toListingsLanguage
                                 ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Shared (safeRead)
 import Text.Highlighting.Kate
diff --git a/src/Text/Pandoc/ImageSize.hs b/src/Text/Pandoc/ImageSize.hs
index a38a9dcd1..5b4593a4c 100644
--- a/src/Text/Pandoc/ImageSize.hs
+++ b/src/Text/Pandoc/ImageSize.hs
@@ -31,6 +31,7 @@ Functions for determining the size of a PNG, JPEG, or GIF image.
 -}
 module Text.Pandoc.ImageSize ( ImageType(..), imageType, imageSize,
                     sizeInPixels, sizeInPoints ) where
+import Prelude
 import Data.ByteString (ByteString, unpack)
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy as BL
diff --git a/src/Text/Pandoc/MIME.hs b/src/Text/Pandoc/MIME.hs
index 6fd9ac373..926a98b53 100644
--- a/src/Text/Pandoc/MIME.hs
+++ b/src/Text/Pandoc/MIME.hs
@@ -29,6 +29,7 @@ Mime type lookup for ODT writer.
 -}
 module Text.Pandoc.MIME ( MimeType, getMimeType, getMimeTypeDef,
                           extensionFromMimeType )where
+import Prelude
 import System.FilePath
 import Data.Char ( toLower )
 import Data.List (isPrefixOf, isSuffixOf)
diff --git a/src/Text/Pandoc/MediaBag.hs b/src/Text/Pandoc/MediaBag.hs
index eea25fadf..8f965c3d5 100644
--- a/src/Text/Pandoc/MediaBag.hs
+++ b/src/Text/Pandoc/MediaBag.hs
@@ -36,6 +36,7 @@ module Text.Pandoc.MediaBag (
                      mediaDirectory,
                      extractMediaBag
                      ) where
+import Prelude
 import System.FilePath
 import qualified System.FilePath.Posix as Posix
 import System.Directory (createDirectoryIfMissing)
diff --git a/src/Text/Pandoc/Options.hs b/src/Text/Pandoc/Options.hs
index 20c842e0d..a97c4179d 100644
--- a/src/Text/Pandoc/Options.hs
+++ b/src/Text/Pandoc/Options.hs
@@ -47,6 +47,7 @@ module Text.Pandoc.Options ( Extension(..)
                            , def
                            , isEnabled
                            ) where
+import Prelude
 import Data.Set (Set)
 import qualified Data.Set as Set
 import Data.Default
diff --git a/src/Text/Pandoc/PDF.hs b/src/Text/Pandoc/PDF.hs
index 025f7f576..4c96908c1 100644
--- a/src/Text/Pandoc/PDF.hs
+++ b/src/Text/Pandoc/PDF.hs
@@ -30,6 +30,7 @@ Conversion of LaTeX documents to PDF.
 -}
 module Text.Pandoc.PDF ( makePDF ) where
 
+import Prelude
 import Data.ByteString.Lazy (ByteString)
 import qualified Data.ByteString.Lazy as B
 import qualified Data.ByteString.Lazy.Char8 as BC
diff --git a/src/Text/Pandoc/Parsing.hs b/src/Text/Pandoc/Parsing.hs
index d2eaaf0d1..75c557ac6 100644
--- a/src/Text/Pandoc/Parsing.hs
+++ b/src/Text/Pandoc/Parsing.hs
@@ -180,6 +180,7 @@ import Data.Char ( toLower, toUpper, ord, chr, isAscii, isAlphaNum,
                    isHexDigit, isSpace )
 import Data.List ( intercalate, transpose, isSuffixOf )
 import Text.Pandoc.Shared
+import Prelude
 import qualified Data.Map as M
 import Text.TeXMath.Readers.TeX.Macros (applyMacros, Macro,
                                         parseMacroDefinitions)
diff --git a/src/Text/Pandoc/Pretty.hs b/src/Text/Pandoc/Pretty.hs
index f100fb75d..2589f7f6b 100644
--- a/src/Text/Pandoc/Pretty.hs
+++ b/src/Text/Pandoc/Pretty.hs
@@ -74,6 +74,7 @@ module Text.Pandoc.Pretty (
      )
 
 where
+import Prelude
 import Data.Sequence (Seq, fromList, (<|), singleton, mapWithIndex, viewl, ViewL(..))
 import Data.Foldable (toList)
 import Data.List (intercalate)
diff --git a/src/Text/Pandoc/Process.hs b/src/Text/Pandoc/Process.hs
index e5245638d..77b009d96 100644
--- a/src/Text/Pandoc/Process.hs
+++ b/src/Text/Pandoc/Process.hs
@@ -29,6 +29,7 @@ ByteString variant of 'readProcessWithExitCode'.
 -}
 module Text.Pandoc.Process (pipeProcess)
 where
+import Prelude
 import System.Process
 import System.Exit (ExitCode (..))
 import Control.Exception
diff --git a/src/Text/Pandoc/Readers/CommonMark.hs b/src/Text/Pandoc/Readers/CommonMark.hs
index 51a35c8ad..e6f8026ab 100644
--- a/src/Text/Pandoc/Readers/CommonMark.hs
+++ b/src/Text/Pandoc/Readers/CommonMark.hs
@@ -32,6 +32,7 @@ CommonMark is a strongly specified variant of Markdown: http://commonmark.org.
 module Text.Pandoc.Readers.CommonMark (readCommonMark)
 where
 
+import Prelude
 import CMark
 import Data.Text (unpack, pack)
 import Data.List (groupBy)
diff --git a/src/Text/Pandoc/Readers/DocBook.hs b/src/Text/Pandoc/Readers/DocBook.hs
index f679ddb57..0845f5e03 100644
--- a/src/Text/Pandoc/Readers/DocBook.hs
+++ b/src/Text/Pandoc/Readers/DocBook.hs
@@ -1,4 +1,5 @@
 module Text.Pandoc.Readers.DocBook ( readDocBook ) where
+import Prelude
 import Data.Char (toUpper)
 import Text.Pandoc.Shared (safeRead)
 import Text.Pandoc.Options
diff --git a/src/Text/Pandoc/Readers/Docx.hs b/src/Text/Pandoc/Readers/Docx.hs
index ab49bf002..35b2ba3fd 100644
--- a/src/Text/Pandoc/Readers/Docx.hs
+++ b/src/Text/Pandoc/Readers/Docx.hs
@@ -74,6 +74,7 @@ module Text.Pandoc.Readers.Docx
        ( readDocx
        ) where
 
+import Prelude
 import Codec.Archive.Zip
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
diff --git a/src/Text/Pandoc/Readers/Docx/Fonts.hs b/src/Text/Pandoc/Readers/Docx/Fonts.hs
index b44c71412..967ca296c 100644
--- a/src/Text/Pandoc/Readers/Docx/Fonts.hs
+++ b/src/Text/Pandoc/Readers/Docx/Fonts.hs
@@ -29,6 +29,7 @@ Utilities to convert between font codepoints and unicode characters.
 -}
 module Text.Pandoc.Readers.Docx.Fonts (getUnicode, Font(..)) where
 
+import Prelude
 
 -- | Enumeration of recognised fonts
 data Font = Symbol -- ^ <http://en.wikipedia.org/wiki/Symbol_(typeface) Adobe Symbol>
diff --git a/src/Text/Pandoc/Readers/Docx/Lists.hs b/src/Text/Pandoc/Readers/Docx/Lists.hs
index c265ad074..0c9297139 100644
--- a/src/Text/Pandoc/Readers/Docx/Lists.hs
+++ b/src/Text/Pandoc/Readers/Docx/Lists.hs
@@ -33,6 +33,7 @@ module Text.Pandoc.Readers.Docx.Lists ( blocksToBullets
                                       , listParagraphDivs
                                       ) where
 
+import Prelude
 import Text.Pandoc.JSON
 import Text.Pandoc.Generic (bottomUp)
 import Text.Pandoc.Shared (trim)
diff --git a/src/Text/Pandoc/Readers/Docx/Parse.hs b/src/Text/Pandoc/Readers/Docx/Parse.hs
index 432965d49..91eab1339 100644
--- a/src/Text/Pandoc/Readers/Docx/Parse.hs
+++ b/src/Text/Pandoc/Readers/Docx/Parse.hs
@@ -50,6 +50,7 @@ module Text.Pandoc.Readers.Docx.Parse ( Docx(..)
                                       , Cell(..)
                                       , archiveToDocx
                                       ) where
+import Prelude
 import Codec.Archive.Zip
 import Text.XML.Light
 import Data.Maybe
diff --git a/src/Text/Pandoc/Readers/Docx/Reducible.hs b/src/Text/Pandoc/Readers/Docx/Reducible.hs
index c93b40119..a850141f6 100644
--- a/src/Text/Pandoc/Readers/Docx/Reducible.hs
+++ b/src/Text/Pandoc/Readers/Docx/Reducible.hs
@@ -7,6 +7,7 @@ module Text.Pandoc.Readers.Docx.Reducible ( concatReduce
        where
 
 
+import Prelude
 import Text.Pandoc.Builder
 import Data.List
 import Data.Sequence (ViewR(..), ViewL(..), viewl, viewr)
diff --git a/src/Text/Pandoc/Readers/Docx/StyleMap.hs b/src/Text/Pandoc/Readers/Docx/StyleMap.hs
index 2901ea2a3..231653106 100644
--- a/src/Text/Pandoc/Readers/Docx/StyleMap.hs
+++ b/src/Text/Pandoc/Readers/Docx/StyleMap.hs
@@ -5,6 +5,7 @@ module Text.Pandoc.Readers.Docx.StyleMap (  StyleMaps(..)
                                           , hasStyleName
                                           ) where
 
+import Prelude
 import           Text.XML.Light
 import           Text.Pandoc.Readers.Docx.Util
 import           Control.Monad.State
diff --git a/src/Text/Pandoc/Readers/Docx/Util.hs b/src/Text/Pandoc/Readers/Docx/Util.hs
index 891f107b0..2790c0d1a 100644
--- a/src/Text/Pandoc/Readers/Docx/Util.hs
+++ b/src/Text/Pandoc/Readers/Docx/Util.hs
@@ -5,6 +5,7 @@ module Text.Pandoc.Readers.Docx.Util (
                                       , elemToNameSpaces
                                       ) where
 
+import Prelude
 import Text.XML.Light
 import Data.Maybe (mapMaybe)
 
diff --git a/src/Text/Pandoc/Readers/EPUB.hs b/src/Text/Pandoc/Readers/EPUB.hs
index 2da5e9e18..9938bb70b 100644
--- a/src/Text/Pandoc/Readers/EPUB.hs
+++ b/src/Text/Pandoc/Readers/EPUB.hs
@@ -8,6 +8,7 @@ module Text.Pandoc.Readers.EPUB
   (readEPUB)
   where
 
+import Prelude
 import Text.XML.Light
 import Text.Pandoc.Definition hiding (Attr)
 import Text.Pandoc.Walk (walk, query)
diff --git a/src/Text/Pandoc/Readers/HTML.hs b/src/Text/Pandoc/Readers/HTML.hs
index a97285ae2..570efc2be 100644
--- a/src/Text/Pandoc/Readers/HTML.hs
+++ b/src/Text/Pandoc/Readers/HTML.hs
@@ -38,6 +38,7 @@ module Text.Pandoc.Readers.HTML ( readHtml
                                 , isCommentTag
                                 ) where
 
+import Prelude
 import Text.HTML.TagSoup
 import Text.HTML.TagSoup.Match
 import Text.Pandoc.Definition
diff --git a/src/Text/Pandoc/Readers/Haddock.hs b/src/Text/Pandoc/Readers/Haddock.hs
index 2b74f5f62..578a89d21 100644
--- a/src/Text/Pandoc/Readers/Haddock.hs
+++ b/src/Text/Pandoc/Readers/Haddock.hs
@@ -14,6 +14,7 @@ module Text.Pandoc.Readers.Haddock
     ( readHaddock
     ) where
 
+import Prelude
 import Text.Pandoc.Builder (Blocks, Inlines)
 import qualified Text.Pandoc.Builder as B
 import Text.Pandoc.Shared (trim, splitBy)
@@ -129,7 +130,7 @@ makeExample prompt expression result =
         <> (mconcat $ intersperse B.linebreak $ map coder result')
   where
     -- 1. drop trailing whitespace from the prompt, remember the prefix
-    prefix = takeWhile (`elem` " \t") prompt
+    prefix = takeWhile (`elem` [' ','\t']) prompt
 
     -- 2. drop, if possible, the exact same sequence of whitespace
     -- characters from each result line
diff --git a/src/Text/Pandoc/Readers/LaTeX.hs b/src/Text/Pandoc/Readers/LaTeX.hs
index 359661c3e..dd73feea8 100644
--- a/src/Text/Pandoc/Readers/LaTeX.hs
+++ b/src/Text/Pandoc/Readers/LaTeX.hs
@@ -35,6 +35,7 @@ module Text.Pandoc.Readers.LaTeX ( readLaTeX,
                                    handleIncludes
                                  ) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Walk
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs
index 58878feb5..d3b71c499 100644
--- a/src/Text/Pandoc/Readers/Markdown.hs
+++ b/src/Text/Pandoc/Readers/Markdown.hs
@@ -32,6 +32,7 @@ Conversion of markdown-formatted plain text to 'Pandoc' document.
 module Text.Pandoc.Readers.Markdown ( readMarkdown,
                                       readMarkdownWithWarnings ) where
 
+import Prelude
 import Data.List ( transpose, sortBy, findIndex, intersperse, intercalate )
 import qualified Data.Map as M
 import Data.Scientific (coefficient, base10Exponent)
diff --git a/src/Text/Pandoc/Readers/MediaWiki.hs b/src/Text/Pandoc/Readers/MediaWiki.hs
index 4f5f9c293..b21fb58c0 100644
--- a/src/Text/Pandoc/Readers/MediaWiki.hs
+++ b/src/Text/Pandoc/Readers/MediaWiki.hs
@@ -36,6 +36,7 @@ _ parse templates?
 -}
 module Text.Pandoc.Readers.MediaWiki ( readMediaWiki ) where
 
+import Prelude
 import Text.Pandoc.Definition
 import qualified Text.Pandoc.Builder as B
 import Text.Pandoc.Builder (Inlines, Blocks, trimInlines)
diff --git a/src/Text/Pandoc/Readers/Native.hs b/src/Text/Pandoc/Readers/Native.hs
index 4ec164e19..73ac0d4b2 100644
--- a/src/Text/Pandoc/Readers/Native.hs
+++ b/src/Text/Pandoc/Readers/Native.hs
@@ -30,6 +30,7 @@ Conversion of a string representation of a pandoc type (@Pandoc@,
 -}
 module Text.Pandoc.Readers.Native ( readNative ) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Shared (safeRead)
 
diff --git a/src/Text/Pandoc/Readers/OPML.hs b/src/Text/Pandoc/Readers/OPML.hs
index b2e5f2e67..e7633e414 100644
--- a/src/Text/Pandoc/Readers/OPML.hs
+++ b/src/Text/Pandoc/Readers/OPML.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE FlexibleContexts #-}
 module Text.Pandoc.Readers.OPML ( readOPML ) where
+import Prelude
 import Data.Char (toUpper)
 import Text.Pandoc.Options
 import Text.Pandoc.Definition
diff --git a/src/Text/Pandoc/Readers/Odt.hs b/src/Text/Pandoc/Readers/Odt.hs
index a925c1d84..cc15c9e20 100644
--- a/src/Text/Pandoc/Readers/Odt.hs
+++ b/src/Text/Pandoc/Readers/Odt.hs
@@ -32,6 +32,7 @@ Entry point to the odt reader.
 
 module Text.Pandoc.Readers.Odt ( readOdt ) where
 
+import Prelude
 import           Codec.Archive.Zip
 import qualified Text.XML.Light                        as XML
 
diff --git a/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs b/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
index fdc02d8d2..e7d2bcb92 100644
--- a/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
+++ b/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
@@ -39,6 +39,7 @@ with an equivalent return value.
 -- We export everything
 module Text.Pandoc.Readers.Odt.Arrows.Utils where
 
+import Prelude
 import           Control.Arrow
 import           Control.Monad                         ( join, MonadPlus(..) )
 
diff --git a/src/Text/Pandoc/Readers/Odt/ContentReader.hs b/src/Text/Pandoc/Readers/Odt/ContentReader.hs
index 1f1c57646..06dd83668 100644
--- a/src/Text/Pandoc/Readers/Odt/ContentReader.hs
+++ b/src/Text/Pandoc/Readers/Odt/ContentReader.hs
@@ -39,6 +39,7 @@ module Text.Pandoc.Readers.Odt.ContentReader
 , read_body
 ) where
 
+import Prelude
 import           Control.Arrow
 import           Control.Applicative    hiding ( liftA, liftA2, liftA3 )
 
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs b/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
index 343ec14ee..7213bc8f1 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
@@ -39,6 +39,7 @@ compatible instances of "ArrowChoice".
 -- We export everything
 module Text.Pandoc.Readers.Odt.Generic.Fallible where
 
+import Prelude
 import           Control.Applicative
 import           Control.Monad
 
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/Namespaces.hs b/src/Text/Pandoc/Readers/Odt/Generic/Namespaces.hs
index 82ae3e20e..0a6095e98 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/Namespaces.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/Namespaces.hs
@@ -31,6 +31,7 @@ typesafe Haskell namespace identifiers and unsafe "real world" namespaces.
 
 module Text.Pandoc.Readers.Odt.Generic.Namespaces where
 
+import Prelude
 import qualified Data.Map as M
 
 --
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/SetMap.hs b/src/Text/Pandoc/Readers/Odt/Generic/SetMap.hs
index afd7d616c..b7a555219 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/SetMap.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/SetMap.hs
@@ -30,6 +30,7 @@ A map of values to sets of values.
 
 module Text.Pandoc.Readers.Odt.Generic.SetMap where
 
+import Prelude
 import qualified Data.Map as M
 import qualified Data.Set as S
 
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs b/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
index 6c10ed61d..a09b4cc1d 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
@@ -53,6 +53,7 @@ module Text.Pandoc.Readers.Odt.Generic.Utils
 , composition
 ) where
 
+import Prelude
 import           Control.Category        ( Category, (>>>), (<<<) )
 import qualified Control.Category as Cat ( id )
 import           Control.Monad           ( msum )
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs b/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
index 8c03d1a09..7d72ee125 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
@@ -116,6 +116,7 @@ module Text.Pandoc.Readers.Odt.Generic.XMLConverter
 , matchContent
 ) where
 
+import Prelude
 import           Control.Applicative  hiding ( liftA, liftA2 )
 import           Control.Monad               ( MonadPlus )
 import           Control.Arrow
diff --git a/src/Text/Pandoc/Readers/Odt/Namespaces.hs b/src/Text/Pandoc/Readers/Odt/Namespaces.hs
index deb009998..f00093368 100644
--- a/src/Text/Pandoc/Readers/Odt/Namespaces.hs
+++ b/src/Text/Pandoc/Readers/Odt/Namespaces.hs
@@ -31,6 +31,7 @@ Namespaces used in odt files.
 module Text.Pandoc.Readers.Odt.Namespaces ( Namespace (..)
                                           ) where
 
+import Prelude
 import           Data.List       ( isPrefixOf )
 import           Data.Maybe      ( fromMaybe, listToMaybe )
 import qualified Data.Map   as M ( empty, insert )
diff --git a/src/Text/Pandoc/Readers/Odt/StyleReader.hs b/src/Text/Pandoc/Readers/Odt/StyleReader.hs
index 96cfed0b3..4140bf2c7 100644
--- a/src/Text/Pandoc/Readers/Odt/StyleReader.hs
+++ b/src/Text/Pandoc/Readers/Odt/StyleReader.hs
@@ -70,6 +70,7 @@ module Text.Pandoc.Readers.Odt.StyleReader
 , readStylesAt
 ) where
 
+import Prelude
 import           Control.Arrow
 import           Control.Applicative hiding ( liftA, liftA2, liftA3 )
 
diff --git a/src/Text/Pandoc/Readers/Org.hs b/src/Text/Pandoc/Readers/Org.hs
index 2585ace21..d27acea2a 100644
--- a/src/Text/Pandoc/Readers/Org.hs
+++ b/src/Text/Pandoc/Readers/Org.hs
@@ -30,6 +30,7 @@ Conversion of org-mode formatted plain text to 'Pandoc' document.
 -}
 module Text.Pandoc.Readers.Org ( readOrg ) where
 
+import Prelude
 import qualified Text.Pandoc.Builder as B
 import           Text.Pandoc.Builder ( Inlines, Blocks, HasMeta(..),
                                        trimInlines )
diff --git a/src/Text/Pandoc/Readers/RST.hs b/src/Text/Pandoc/Readers/RST.hs
index 4fb30e6c4..82fa67407 100644
--- a/src/Text/Pandoc/Readers/RST.hs
+++ b/src/Text/Pandoc/Readers/RST.hs
@@ -33,6 +33,7 @@ module Text.Pandoc.Readers.RST (
                                 readRST,
                                 readRSTWithWarnings
                                ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Builder (setMeta, fromList)
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Readers/TWiki.hs b/src/Text/Pandoc/Readers/TWiki.hs
index fc2bdc069..558e9691a 100644
--- a/src/Text/Pandoc/Readers/TWiki.hs
+++ b/src/Text/Pandoc/Readers/TWiki.hs
@@ -33,6 +33,7 @@ module Text.Pandoc.Readers.TWiki ( readTWiki
                                  , readTWikiWithWarnings
                                  ) where
 
+import Prelude
 import Text.Pandoc.Definition
 import qualified Text.Pandoc.Builder as B
 import Text.Pandoc.Options
diff --git a/src/Text/Pandoc/Readers/TeXMath.hs b/src/Text/Pandoc/Readers/TeXMath.hs
index e5778b123..ad0eacb2b 100644
--- a/src/Text/Pandoc/Readers/TeXMath.hs
+++ b/src/Text/Pandoc/Readers/TeXMath.hs
@@ -29,6 +29,7 @@ Conversion of TeX math to a list of 'Pandoc' inline elements.
 -}
 module Text.Pandoc.Readers.TeXMath ( texMathToInlines ) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Text.TeXMath
 
diff --git a/src/Text/Pandoc/Readers/Textile.hs b/src/Text/Pandoc/Readers/Textile.hs
index 43aaa3f9a..a99831a56 100644
--- a/src/Text/Pandoc/Readers/Textile.hs
+++ b/src/Text/Pandoc/Readers/Textile.hs
@@ -51,6 +51,7 @@ TODO : refactor common patterns across readers :
 
 
 module Text.Pandoc.Readers.Textile ( readTextile) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Builder (Inlines, Blocks, trimInlines)
 import qualified Text.Pandoc.Builder as B
diff --git a/src/Text/Pandoc/Readers/Txt2Tags.hs b/src/Text/Pandoc/Readers/Txt2Tags.hs
index 1c868f5f0..3a3172734 100644
--- a/src/Text/Pandoc/Readers/Txt2Tags.hs
+++ b/src/Text/Pandoc/Readers/Txt2Tags.hs
@@ -32,6 +32,7 @@ module Text.Pandoc.Readers.Txt2Tags ( readTxt2Tags
                                     , readTxt2TagsNoMacros)
                                     where
 
+import Prelude
 import qualified Text.Pandoc.Builder as B
 import Text.Pandoc.Builder ( Inlines, Blocks, trimInlines )
 import Text.Pandoc.Definition
diff --git a/src/Text/Pandoc/SelfContained.hs b/src/Text/Pandoc/SelfContained.hs
index 390a7a21a..16013f466 100644
--- a/src/Text/Pandoc/SelfContained.hs
+++ b/src/Text/Pandoc/SelfContained.hs
@@ -31,6 +31,7 @@ offline, by incorporating linked images, CSS, and scripts into
 the HTML using data URIs.
 -}
 module Text.Pandoc.SelfContained ( makeSelfContained ) where
+import Prelude
 import Text.HTML.TagSoup
 import Network.URI (isURI, escapeURIString, URI(..), parseURI)
 import Data.ByteString.Base64
diff --git a/src/Text/Pandoc/Shared.hs b/src/Text/Pandoc/Shared.hs
index a40b1d4e9..91ccfb134 100644
--- a/src/Text/Pandoc/Shared.hs
+++ b/src/Text/Pandoc/Shared.hs
@@ -97,6 +97,7 @@ module Text.Pandoc.Shared (
                      pandocVersion
                     ) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Walk
 import Text.Pandoc.MediaBag (MediaBag, lookupMedia)
@@ -246,7 +247,7 @@ trim = triml . trimr
 
 -- | Remove leading space (including newlines) from string.
 triml :: String -> String
-triml = dropWhile (`elem` " \r\n\t")
+triml = dropWhile (`elem` [' ','\r','\n','\t'])
 
 -- | Remove trailing space (including newlines) from string.
 trimr :: String -> String
@@ -659,7 +660,7 @@ inlineListToIdentifier :: [Inline] -> String
 inlineListToIdentifier =
   dropWhile (not . isAlpha) . intercalate "-" . words .
     map (nbspToSp . toLower) .
-    filter (\c -> isLetter c || isDigit c || c `elem` "_-. ") .
+    filter (\c -> isLetter c || isDigit c || c `elem` ['_','-','.',' ']) .
     stringify
  where nbspToSp '\160'     =  ' '
        nbspToSp x          =  x
@@ -913,9 +914,9 @@ fetchItem' media sourceURL s = do
 -- | Read from a URL and return raw data and maybe mime type.
 openURL :: String -> IO (Either E.SomeException (BS.ByteString, Maybe MimeType))
 openURL u
-  | Just u' <- stripPrefix "data:" u =
-    let mime     = takeWhile (/=',') u'
-        contents = B8.pack $ unEscapeString $ drop 1 $ dropWhile (/=',') u'
+  | Just u'' <- stripPrefix "data:" u =
+    let mime     = takeWhile (/=',') u''
+        contents = B8.pack $ unEscapeString $ drop 1 $ dropWhile (/=',') u''
     in  return $ Right (decodeLenient contents, Just mime)
 #ifdef HTTP_CLIENT
   | otherwise = withSocketsDo $ E.try $ do
diff --git a/src/Text/Pandoc/Slides.hs b/src/Text/Pandoc/Slides.hs
index 878c900f7..7fdb9d7c4 100644
--- a/src/Text/Pandoc/Slides.hs
+++ b/src/Text/Pandoc/Slides.hs
@@ -29,6 +29,7 @@ Utility functions for splitting documents into slides for slide
 show formats (dzslides, revealjs, s5, slidy, slideous, beamer).
 -}
 module Text.Pandoc.Slides ( getSlideLevel, prepSlides ) where
+import Prelude
 import Text.Pandoc.Definition
 
 -- | Find level of header that starts slides (defined as the least header
diff --git a/src/Text/Pandoc/Templates.hs b/src/Text/Pandoc/Templates.hs
index f366299d5..027996703 100644
--- a/src/Text/Pandoc/Templates.hs
+++ b/src/Text/Pandoc/Templates.hs
@@ -93,6 +93,7 @@ module Text.Pandoc.Templates ( renderTemplate
                              , Template
                              , getDefaultTemplate ) where
 
+import Prelude
 import Data.Char (isAlphaNum)
 import Control.Monad (guard, when)
 import Data.Aeson (ToJSON(..), Value(..))
diff --git a/src/Text/Pandoc/UUID.hs b/src/Text/Pandoc/UUID.hs
index 463be044c..a99be725d 100644
--- a/src/Text/Pandoc/UUID.hs
+++ b/src/Text/Pandoc/UUID.hs
@@ -31,6 +31,7 @@ in RFC4122. See http://tools.ietf.org/html/rfc4122
 
 module Text.Pandoc.UUID ( UUID, getRandomUUID ) where
 
+import Prelude
 import Text.Printf ( printf )
 import System.Random ( randomIO )
 import Data.Word
diff --git a/src/Text/Pandoc/Writers/AsciiDoc.hs b/src/Text/Pandoc/Writers/AsciiDoc.hs
index c3406f31f..832bd5fec 100644
--- a/src/Text/Pandoc/Writers/AsciiDoc.hs
+++ b/src/Text/Pandoc/Writers/AsciiDoc.hs
@@ -37,6 +37,7 @@ that it has omitted the construct.
 AsciiDoc:  <http://www.methods.co.nz/asciidoc/>
 -}
 module Text.Pandoc.Writers.AsciiDoc (writeAsciiDoc) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Templates (renderTemplate')
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/CommonMark.hs b/src/Text/Pandoc/Writers/CommonMark.hs
index fee36d454..38cfcd82c 100644
--- a/src/Text/Pandoc/Writers/CommonMark.hs
+++ b/src/Text/Pandoc/Writers/CommonMark.hs
@@ -31,6 +31,7 @@ CommonMark:  <http://commonmark.org>
 -}
 module Text.Pandoc.Writers.CommonMark (writeCommonMark) where
 
+import Prelude
 import Text.Pandoc.Writers.HTML (writeHtmlString)
 import Text.Pandoc.Definition
 import Text.Pandoc.Shared (isTightList)
diff --git a/src/Text/Pandoc/Writers/ConTeXt.hs b/src/Text/Pandoc/Writers/ConTeXt.hs
index 61e62aa17..562c9e015 100644
--- a/src/Text/Pandoc/Writers/ConTeXt.hs
+++ b/src/Text/Pandoc/Writers/ConTeXt.hs
@@ -29,6 +29,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' format into ConTeXt.
 -}
 module Text.Pandoc.Writers.ConTeXt ( writeConTeXt ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Shared
 import Text.Pandoc.Writers.Shared
diff --git a/src/Text/Pandoc/Writers/Custom.hs b/src/Text/Pandoc/Writers/Custom.hs
index 8b7dde3e5..ac8e8cf36 100644
--- a/src/Text/Pandoc/Writers/Custom.hs
+++ b/src/Text/Pandoc/Writers/Custom.hs
@@ -35,6 +35,7 @@ Conversion of 'Pandoc' documents to custom markup using
 a lua writer.
 -}
 module Text.Pandoc.Writers.Custom ( writeCustom ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Data.List ( intersperse )
diff --git a/src/Text/Pandoc/Writers/Docbook.hs b/src/Text/Pandoc/Writers/Docbook.hs
index 8f9eecea8..bedaaf690 100644
--- a/src/Text/Pandoc/Writers/Docbook.hs
+++ b/src/Text/Pandoc/Writers/Docbook.hs
@@ -29,6 +29,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' documents to Docbook XML.
 -}
 module Text.Pandoc.Writers.Docbook ( writeDocbook) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.XML
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/Docx.hs b/src/Text/Pandoc/Writers/Docx.hs
index 639818f2e..eabf9fb05 100644
--- a/src/Text/Pandoc/Writers/Docx.hs
+++ b/src/Text/Pandoc/Writers/Docx.hs
@@ -29,6 +29,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' documents to docx.
 -}
 module Text.Pandoc.Writers.Docx ( writeDocx ) where
+import Prelude
 import Data.List ( intercalate, isPrefixOf, isSuffixOf )
 import qualified Data.ByteString as B
 import qualified Data.ByteString.Lazy as BL
diff --git a/src/Text/Pandoc/Writers/DokuWiki.hs b/src/Text/Pandoc/Writers/DokuWiki.hs
index b68c46c7e..e7dbd7e2a 100644
--- a/src/Text/Pandoc/Writers/DokuWiki.hs
+++ b/src/Text/Pandoc/Writers/DokuWiki.hs
@@ -39,6 +39,7 @@ DokuWiki:  <https://www.dokuwiki.org/dokuwiki>
 -}
 
 module Text.Pandoc.Writers.DokuWiki ( writeDokuWiki ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options ( WriterOptions(
                                 writerTableOfContents
diff --git a/src/Text/Pandoc/Writers/EPUB.hs b/src/Text/Pandoc/Writers/EPUB.hs
index 2843f8c74..2698ea4be 100644
--- a/src/Text/Pandoc/Writers/EPUB.hs
+++ b/src/Text/Pandoc/Writers/EPUB.hs
@@ -29,6 +29,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' documents to EPUB.
 -}
 module Text.Pandoc.Writers.EPUB ( writeEPUB ) where
+import Prelude
 import Data.IORef ( IORef, newIORef, readIORef, modifyIORef )
 import qualified Data.Map as M
 import Data.Maybe ( fromMaybe, catMaybes )
diff --git a/src/Text/Pandoc/Writers/FB2.hs b/src/Text/Pandoc/Writers/FB2.hs
index 31fa4bee8..f65f26dd6 100644
--- a/src/Text/Pandoc/Writers/FB2.hs
+++ b/src/Text/Pandoc/Writers/FB2.hs
@@ -27,6 +27,7 @@ FictionBook is an XML-based e-book format. For more information see:
 -}
 module Text.Pandoc.Writers.FB2 (writeFB2)  where
 
+import Prelude
 import Control.Monad.State (StateT, evalStateT, get, modify)
 import Control.Monad.State (liftM, liftM2, liftIO)
 import Data.ByteString.Base64 (encode)
diff --git a/src/Text/Pandoc/Writers/HTML.hs b/src/Text/Pandoc/Writers/HTML.hs
index 9b362adf1..512638a0e 100644
--- a/src/Text/Pandoc/Writers/HTML.hs
+++ b/src/Text/Pandoc/Writers/HTML.hs
@@ -30,6 +30,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' documents to HTML.
 -}
 module Text.Pandoc.Writers.HTML ( writeHtml , writeHtmlString ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Shared
 import Text.Pandoc.Writers.Shared
diff --git a/src/Text/Pandoc/Writers/Haddock.hs b/src/Text/Pandoc/Writers/Haddock.hs
index 14f398da9..884a0b318 100644
--- a/src/Text/Pandoc/Writers/Haddock.hs
+++ b/src/Text/Pandoc/Writers/Haddock.hs
@@ -31,6 +31,7 @@ Conversion of 'Pandoc' documents to haddock markup.
 Haddock:  <http://www.haskell.org/haddock/doc/html/>
 -}
 module Text.Pandoc.Writers.Haddock (writeHaddock) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Templates (renderTemplate')
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/ICML.hs b/src/Text/Pandoc/Writers/ICML.hs
index ae068a94f..3bb179353 100644
--- a/src/Text/Pandoc/Writers/ICML.hs
+++ b/src/Text/Pandoc/Writers/ICML.hs
@@ -14,6 +14,7 @@ InCopy is the companion word-processor to Adobe InDesign and ICML documents can
 into InDesign with File -> Place.
 -}
 module Text.Pandoc.Writers.ICML (writeICML) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.XML
 import Text.Pandoc.Writers.Shared
diff --git a/src/Text/Pandoc/Writers/LaTeX.hs b/src/Text/Pandoc/Writers/LaTeX.hs
index f23b06d02..97104c4dc 100644
--- a/src/Text/Pandoc/Writers/LaTeX.hs
+++ b/src/Text/Pandoc/Writers/LaTeX.hs
@@ -30,6 +30,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' format into LaTeX.
 -}
 module Text.Pandoc.Writers.LaTeX ( writeLaTeX ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Walk
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/Man.hs b/src/Text/Pandoc/Writers/Man.hs
index 6b1e42394..d6fc0646b 100644
--- a/src/Text/Pandoc/Writers/Man.hs
+++ b/src/Text/Pandoc/Writers/Man.hs
@@ -29,6 +29,7 @@ Conversion of 'Pandoc' documents to groff man page format.
 
 -}
 module Text.Pandoc.Writers.Man ( writeMan) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Templates
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/Markdown.hs b/src/Text/Pandoc/Writers/Markdown.hs
index cd9c26289..e37e84c4f 100644
--- a/src/Text/Pandoc/Writers/Markdown.hs
+++ b/src/Text/Pandoc/Writers/Markdown.hs
@@ -31,6 +31,7 @@ Conversion of 'Pandoc' documents to markdown-formatted plain text.
 Markdown:  <http://daringfireball.net/projects/markdown/>
 -}
 module Text.Pandoc.Writers.Markdown (writeMarkdown, writePlain) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Walk
 import Text.Pandoc.Templates (renderTemplate')
diff --git a/src/Text/Pandoc/Writers/MediaWiki.hs b/src/Text/Pandoc/Writers/MediaWiki.hs
index 2b7c47e24..2735d2721 100644
--- a/src/Text/Pandoc/Writers/MediaWiki.hs
+++ b/src/Text/Pandoc/Writers/MediaWiki.hs
@@ -30,6 +30,7 @@ Conversion of 'Pandoc' documents to MediaWiki markup.
 MediaWiki:  <http://www.mediawiki.org/wiki/MediaWiki>
 -}
 module Text.Pandoc.Writers.MediaWiki ( writeMediaWiki ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/Native.hs b/src/Text/Pandoc/Writers/Native.hs
index 2343ff1a8..80694d74a 100644
--- a/src/Text/Pandoc/Writers/Native.hs
+++ b/src/Text/Pandoc/Writers/Native.hs
@@ -34,6 +34,7 @@ metadata.
 -}
 module Text.Pandoc.Writers.Native ( writeNative )
 where
+import Prelude
 import Text.Pandoc.Options ( WriterOptions(..) )
 import Data.List ( intersperse )
 import Text.Pandoc.Definition
diff --git a/src/Text/Pandoc/Writers/ODT.hs b/src/Text/Pandoc/Writers/ODT.hs
index 922a3a785..6947ef396 100644
--- a/src/Text/Pandoc/Writers/ODT.hs
+++ b/src/Text/Pandoc/Writers/ODT.hs
@@ -29,6 +29,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' documents to ODT.
 -}
 module Text.Pandoc.Writers.ODT ( writeODT ) where
+import Prelude
 import Data.IORef
 import Data.List ( isPrefixOf )
 import Data.Maybe ( fromMaybe )
diff --git a/src/Text/Pandoc/Writers/OPML.hs b/src/Text/Pandoc/Writers/OPML.hs
index 519136861..ecf6799f5 100644
--- a/src/Text/Pandoc/Writers/OPML.hs
+++ b/src/Text/Pandoc/Writers/OPML.hs
@@ -29,6 +29,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' documents to OPML XML.
 -}
 module Text.Pandoc.Writers.OPML ( writeOPML) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.XML
 import Text.Pandoc.Writers.Shared
diff --git a/src/Text/Pandoc/Writers/OpenDocument.hs b/src/Text/Pandoc/Writers/OpenDocument.hs
index ebe678dc0..5d7f10bdd 100644
--- a/src/Text/Pandoc/Writers/OpenDocument.hs
+++ b/src/Text/Pandoc/Writers/OpenDocument.hs
@@ -30,6 +30,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' documents to OpenDocument XML.
 -}
 module Text.Pandoc.Writers.OpenDocument ( writeOpenDocument ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Text.Pandoc.XML
diff --git a/src/Text/Pandoc/Writers/Org.hs b/src/Text/Pandoc/Writers/Org.hs
index 1b0ab387f..9e7894bed 100644
--- a/src/Text/Pandoc/Writers/Org.hs
+++ b/src/Text/Pandoc/Writers/Org.hs
@@ -32,6 +32,7 @@ Conversion of 'Pandoc' documents to Emacs Org-Mode.
 Org-Mode:  <http://orgmode.org>
 -}
 module Text.Pandoc.Writers.Org ( writeOrg) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/RST.hs b/src/Text/Pandoc/Writers/RST.hs
index 334619880..cf6fe38e9 100644
--- a/src/Text/Pandoc/Writers/RST.hs
+++ b/src/Text/Pandoc/Writers/RST.hs
@@ -31,6 +31,7 @@ Conversion of 'Pandoc' documents to reStructuredText.
 reStructuredText:  <http://docutils.sourceforge.net/rst.html>
 -}
 module Text.Pandoc.Writers.RST ( writeRST ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/RTF.hs b/src/Text/Pandoc/Writers/RTF.hs
index 9eb02ad02..ec289e7a4 100644
--- a/src/Text/Pandoc/Writers/RTF.hs
+++ b/src/Text/Pandoc/Writers/RTF.hs
@@ -28,6 +28,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' documents to RTF (rich text format).
 -}
 module Text.Pandoc.Writers.RTF ( writeRTF, writeRTFWithEmbeddedImages ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/Shared.hs b/src/Text/Pandoc/Writers/Shared.hs
index d94dbac46..2c9d077cc 100644
--- a/src/Text/Pandoc/Writers/Shared.hs
+++ b/src/Text/Pandoc/Writers/Shared.hs
@@ -37,6 +37,7 @@ module Text.Pandoc.Writers.Shared (
                      , fixDisplayMath
                      )
 where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Pretty
 import Text.Pandoc.XML (escapeStringForXML)
diff --git a/src/Text/Pandoc/Writers/Texinfo.hs b/src/Text/Pandoc/Writers/Texinfo.hs
index 2325d1425..119c45155 100644
--- a/src/Text/Pandoc/Writers/Texinfo.hs
+++ b/src/Text/Pandoc/Writers/Texinfo.hs
@@ -29,6 +29,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion of 'Pandoc' format into Texinfo.
 -}
 module Text.Pandoc.Writers.Texinfo ( writeTexinfo ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/Writers/Textile.hs b/src/Text/Pandoc/Writers/Textile.hs
index dbc9eb40a..6322ce232 100644
--- a/src/Text/Pandoc/Writers/Textile.hs
+++ b/src/Text/Pandoc/Writers/Textile.hs
@@ -30,6 +30,7 @@ Conversion of 'Pandoc' documents to Textile markup.
 Textile:  <http://thresholdstate.com/articles/4312/the-textile-reference-manual>
 -}
 module Text.Pandoc.Writers.Textile ( writeTextile ) where
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Text.Pandoc.Shared
diff --git a/src/Text/Pandoc/XML.hs b/src/Text/Pandoc/XML.hs
index caa13f177..f53251a1f 100644
--- a/src/Text/Pandoc/XML.hs
+++ b/src/Text/Pandoc/XML.hs
@@ -36,6 +36,7 @@ module Text.Pandoc.XML ( escapeCharForXML,
                          toEntities,
                          fromEntities ) where
 
+import Prelude
 import Text.Pandoc.Pretty
 import Data.Char (ord, isAscii, isSpace)
 import Text.Pandoc.Compat.TagSoupEntity (lookupEntity)
diff --git a/tests/Tests/Arbitrary.hs b/tests/Tests/Arbitrary.hs
index 3675d97bf..9073f2521 100644
--- a/tests/Tests/Arbitrary.hs
+++ b/tests/Tests/Arbitrary.hs
@@ -3,6 +3,7 @@
 -- provides Arbitrary instance for Pandoc types
 module Tests.Arbitrary ()
 where
+import Prelude
 import Test.QuickCheck.Gen
 import Test.QuickCheck.Arbitrary
 import Control.Monad (liftM, liftM2)
diff --git a/tests/Tests/Helpers.hs b/tests/Tests/Helpers.hs
index b48c8af3a..ffaf39cc5 100644
--- a/tests/Tests/Helpers.hs
+++ b/tests/Tests/Helpers.hs
@@ -9,6 +9,7 @@ module Tests.Helpers ( test
                      )
                      where
 
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Builder (Inlines, Blocks, doc, plain)
 import Test.Framework
diff --git a/tests/Tests/Old.hs b/tests/Tests/Old.hs
index c27d30deb..c07f2ca4d 100644
--- a/tests/Tests/Old.hs
+++ b/tests/Tests/Old.hs
@@ -1,5 +1,6 @@
 module Tests.Old (tests) where
 
+import Prelude
 import Test.Framework (testGroup, Test )
 import Test.Framework.Providers.HUnit
 import Test.HUnit ( assertBool )
diff --git a/tests/Tests/Readers/Docx.hs b/tests/Tests/Readers/Docx.hs
index 7e3f1979e..f826a73f9 100644
--- a/tests/Tests/Readers/Docx.hs
+++ b/tests/Tests/Readers/Docx.hs
@@ -1,5 +1,6 @@
 module Tests.Readers.Docx (tests) where
 
+import Prelude
 import Text.Pandoc.Options
 import Text.Pandoc.Readers.Native
 import Text.Pandoc.Definition
diff --git a/tests/Tests/Readers/EPUB.hs b/tests/Tests/Readers/EPUB.hs
index 2ad36eba6..b06d8bcfe 100644
--- a/tests/Tests/Readers/EPUB.hs
+++ b/tests/Tests/Readers/EPUB.hs
@@ -1,5 +1,6 @@
 module Tests.Readers.EPUB (tests) where
 
+import Prelude
 import Text.Pandoc.Options
 import Test.Framework
 import Test.HUnit (assertBool)
diff --git a/tests/Tests/Readers/HTML.hs b/tests/Tests/Readers/HTML.hs
index 2eb87a2f3..df7a55d68 100644
--- a/tests/Tests/Readers/HTML.hs
+++ b/tests/Tests/Readers/HTML.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Readers.HTML (tests) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Test.Framework
 import Tests.Helpers
diff --git a/tests/Tests/Readers/LaTeX.hs b/tests/Tests/Readers/LaTeX.hs
index e21f75aa9..3444214cb 100644
--- a/tests/Tests/Readers/LaTeX.hs
+++ b/tests/Tests/Readers/LaTeX.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Readers.LaTeX (tests) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Test.Framework
 import Tests.Helpers
diff --git a/tests/Tests/Readers/Markdown.hs b/tests/Tests/Readers/Markdown.hs
index f6afacb34..7cef6e225 100644
--- a/tests/Tests/Readers/Markdown.hs
+++ b/tests/Tests/Readers/Markdown.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Readers.Markdown (tests) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Test.Framework
 import Tests.Helpers
diff --git a/tests/Tests/Readers/Odt.hs b/tests/Tests/Readers/Odt.hs
index cf30b8398..4d9936bf0 100644
--- a/tests/Tests/Readers/Odt.hs
+++ b/tests/Tests/Readers/Odt.hs
@@ -1,5 +1,6 @@
 module Tests.Readers.Odt (tests) where
 
+import Prelude
 import Control.Monad ( liftM )
 import Text.Pandoc.Options
 import Text.Pandoc.Readers.Native
@@ -162,4 +163,4 @@ namesOfTestsComparingToNative   = [ "blockquote"
 --                                , "table"
                                   , "unicode"
                                   , "unorderedList"
-                                  ]
\ No newline at end of file
+                                  ]
diff --git a/tests/Tests/Readers/Org.hs b/tests/Tests/Readers/Org.hs
index 66f284b28..d318ea92c 100644
--- a/tests/Tests/Readers/Org.hs
+++ b/tests/Tests/Readers/Org.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Readers.Org (tests) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Test.Framework
 import Tests.Helpers
diff --git a/tests/Tests/Readers/RST.hs b/tests/Tests/Readers/RST.hs
index df6ba61b2..d589f6561 100644
--- a/tests/Tests/Readers/RST.hs
+++ b/tests/Tests/Readers/RST.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings, ScopedTypeVariables #-}
 module Tests.Readers.RST (tests) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Test.Framework
 import Tests.Helpers
diff --git a/tests/Tests/Readers/Txt2Tags.hs b/tests/Tests/Readers/Txt2Tags.hs
index bfe217ce3..2c1747eaa 100644
--- a/tests/Tests/Readers/Txt2Tags.hs
+++ b/tests/Tests/Readers/Txt2Tags.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Readers.Txt2Tags (tests) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Test.Framework
 import Tests.Helpers
diff --git a/tests/Tests/Shared.hs b/tests/Tests/Shared.hs
index 12652e4b7..3e2c5179d 100644
--- a/tests/Tests/Shared.hs
+++ b/tests/Tests/Shared.hs
@@ -1,5 +1,6 @@
 module Tests.Shared (tests) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Shared
 import Test.Framework
diff --git a/tests/Tests/Walk.hs b/tests/Tests/Walk.hs
index c87cc17d7..9ba752c0b 100644
--- a/tests/Tests/Walk.hs
+++ b/tests/Tests/Walk.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE ScopedTypeVariables, FlexibleContexts #-}
 module Tests.Walk (tests) where
 
+import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Walk
 import Test.Framework
diff --git a/tests/Tests/Writers/AsciiDoc.hs b/tests/Tests/Writers/AsciiDoc.hs
index 56a62c6e4..3ca3792e1 100644
--- a/tests/Tests/Writers/AsciiDoc.hs
+++ b/tests/Tests/Writers/AsciiDoc.hs
@@ -1,5 +1,6 @@
 module Tests.Writers.AsciiDoc (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/Tests/Writers/ConTeXt.hs b/tests/Tests/Writers/ConTeXt.hs
index 8f0305adb..b4e1e5317 100644
--- a/tests/Tests/Writers/ConTeXt.hs
+++ b/tests/Tests/Writers/ConTeXt.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Writers.ConTeXt (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/Tests/Writers/Docbook.hs b/tests/Tests/Writers/Docbook.hs
index 97126b473..4543b26ad 100644
--- a/tests/Tests/Writers/Docbook.hs
+++ b/tests/Tests/Writers/Docbook.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Writers.Docbook (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/Tests/Writers/Docx.hs b/tests/Tests/Writers/Docx.hs
index 8dba0ea55..059003cc7 100644
--- a/tests/Tests/Writers/Docx.hs
+++ b/tests/Tests/Writers/Docx.hs
@@ -1,5 +1,6 @@
 module Tests.Writers.Docx (tests) where
 
+import Prelude
 import Text.Pandoc.Options
 import Text.Pandoc.Readers.Native
 import Text.Pandoc.Definition
diff --git a/tests/Tests/Writers/HTML.hs b/tests/Tests/Writers/HTML.hs
index 84f4db191..930aa7da9 100644
--- a/tests/Tests/Writers/HTML.hs
+++ b/tests/Tests/Writers/HTML.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Writers.HTML (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/Tests/Writers/LaTeX.hs b/tests/Tests/Writers/LaTeX.hs
index 27931dc28..4f40ca80c 100644
--- a/tests/Tests/Writers/LaTeX.hs
+++ b/tests/Tests/Writers/LaTeX.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Writers.LaTeX (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/Tests/Writers/Markdown.hs b/tests/Tests/Writers/Markdown.hs
index 8ffd7a8c0..40a0021b1 100644
--- a/tests/Tests/Writers/Markdown.hs
+++ b/tests/Tests/Writers/Markdown.hs
@@ -2,6 +2,7 @@
 {-# OPTIONS_GHC -fno-warn-name-shadowing #-}
 module Tests.Writers.Markdown (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/Tests/Writers/Native.hs b/tests/Tests/Writers/Native.hs
index 9833bf5ae..469429298 100644
--- a/tests/Tests/Writers/Native.hs
+++ b/tests/Tests/Writers/Native.hs
@@ -1,5 +1,6 @@
 module Tests.Writers.Native (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/Tests/Writers/Plain.hs b/tests/Tests/Writers/Plain.hs
index f8f1d3d90..4b32f18eb 100644
--- a/tests/Tests/Writers/Plain.hs
+++ b/tests/Tests/Writers/Plain.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Writers.Plain (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/Tests/Writers/RST.hs b/tests/Tests/Writers/RST.hs
index b9e359dae..74b0dc674 100644
--- a/tests/Tests/Writers/RST.hs
+++ b/tests/Tests/Writers/RST.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module Tests.Writers.RST (tests) where
 
+import Prelude
 import Test.Framework
 import Text.Pandoc.Builder
 import Text.Pandoc
diff --git a/tests/test-pandoc.hs b/tests/test-pandoc.hs
index f7c2f0c1f..1e048206a 100644
--- a/tests/test-pandoc.hs
+++ b/tests/test-pandoc.hs
@@ -2,6 +2,7 @@
 
 module Main where
 
+import Prelude
 import Test.Framework
 import GHC.IO.Encoding
 import qualified Tests.Old