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-rw-r--r--src/Text/Pandoc/App/CommandLineOptions.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Text/Pandoc/App/CommandLineOptions.hs b/src/Text/Pandoc/App/CommandLineOptions.hs
index c041e30e4..98316eee6 100644
--- a/src/Text/Pandoc/App/CommandLineOptions.hs
+++ b/src/Text/Pandoc/App/CommandLineOptions.hs
@@ -45,7 +45,7 @@ import Control.Monad.Trans
import Data.Aeson.Encode.Pretty (encodePretty', Config(..), keyOrder,
defConfig, Indent(..), NumberFormat(..))
import Data.Char (toLower, toUpper)
-import Data.List (intercalate, sort)
+import Data.List (intercalate, sort, isPrefixOf)
import Data.Maybe (fromMaybe)
import Skylighting (Style, Syntax (..), defaultSyntaxMap, parseTheme,
pygments)