Lua filters: add SimpleTable for backwards compatibility (#6575)

A new type `SimpleTable` is made available to Lua filters. It is
similar to the `Table` type in pandoc versions before 2.10;
conversion functions from and to the new Table type are provided.

Old filters using tables now require minimal changes and can use,
e.g.,

    if PANDOC_VERSION > {2,10,1} then
      pandoc.Table = pandoc.SimpleTable
    end

and

    function Table (tbl)
      tbl = pandoc.utils.to_simple_table(tbl)
      …
      return pandoc.utils.from_simple_table(tbl)
    end

to work with the current pandoc version.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Text/Pandoc/Lua/Util.hs b/src/Text/Pandoc/Lua/Util.hs
index c6639e94c..fbd013801 100644
--- a/src/Text/Pandoc/Lua/Util.hs
+++ b/src/Text/Pandoc/Lua/Util.hs
@@ -80,7 +80,7 @@ instance (Pushable a, PushViaCall b) => PushViaCall (a -> b) where
 pushViaCall :: PushViaCall a => String -> a
 pushViaCall fn = pushViaCall' fn (return ()) 0
 
--- | Call a pandoc element constructor within lua, passing all given arguments.
+-- | Call a pandoc element constructor within Lua, passing all given arguments.
 pushViaConstructor :: PushViaCall a => String -> a
 pushViaConstructor pandocFn = pushViaCall ("pandoc." ++ pandocFn)