Haddock Writer: Support Haddock tables

See this PR on Haddock for details on the table format:
haskell/haddock#718

Author: expipiplus1

src/Text/Pandoc/Writers/Haddock.hs

@@ -125,7 +125,7 @@ blockToHaddock opts (Table caption aligns widths headers rows) = do
               (all null headers) strictWrapping
               (map (const AlignDefault) aligns)
               widths headers rows
-  return $ prefixed "> " (tbl $$ blankline $$ caption'') $$ blankline
+  return $ (tbl $$ blankline $$ caption'') $$ blankline
 blockToHaddock opts (BulletList items) = do
   contents <- mapM (bulletListItemToHaddock opts) items
   return $ (if isTightList items then vcat else vsep) contents <> blankline

test/tables.haddock

@@ -1,90 +1,90 @@
 Simple table with caption:
 
-> +-------+------+--------+---------+
-> | Right | Left | Center | Default |
-> +=======+======+========+=========+
-> | 12    | 12   | 12     | 12      |
-> +-------+------+--------+---------+
-> | 123   | 123  | 123    | 123     |
-> +-------+------+--------+---------+
-> | 1     | 1    | 1      | 1       |
-> +-------+------+--------+---------+
->
-> Demonstration of simple table syntax.
++-------+------+--------+---------+
+| Right | Left | Center | Default |
++=======+======+========+=========+
+| 12    | 12   | 12     | 12      |
++-------+------+--------+---------+
+| 123   | 123  | 123    | 123     |
++-------+------+--------+---------+
+| 1     | 1    | 1      | 1       |
++-------+------+--------+---------+
+
+Demonstration of simple table syntax.
 
 Simple table without caption:
 
-> +-------+------+--------+---------+
-> | Right | Left | Center | Default |
-> +=======+======+========+=========+
-> | 12    | 12   | 12     | 12      |
-> +-------+------+--------+---------+
-> | 123   | 123  | 123    | 123     |
-> +-------+------+--------+---------+
-> | 1     | 1    | 1      | 1       |
-> +-------+------+--------+---------+
++-------+------+--------+---------+
+| Right | Left | Center | Default |
++=======+======+========+=========+
+| 12    | 12   | 12     | 12      |
++-------+------+--------+---------+
+| 123   | 123  | 123    | 123     |
++-------+------+--------+---------+
+| 1     | 1    | 1      | 1       |
++-------+------+--------+---------+
 
 Simple table indented two spaces:
 
-> +-------+------+--------+---------+
-> | Right | Left | Center | Default |
-> +=======+======+========+=========+
-> | 12    | 12   | 12     | 12      |
-> +-------+------+--------+---------+
-> | 123   | 123  | 123    | 123     |
-> +-------+------+--------+---------+
-> | 1     | 1    | 1      | 1       |
-> +-------+------+--------+---------+
->
-> Demonstration of simple table syntax.
++-------+------+--------+---------+
+| Right | Left | Center | Default |
++=======+======+========+=========+
+| 12    | 12   | 12     | 12      |
++-------+------+--------+---------+
+| 123   | 123  | 123    | 123     |
++-------+------+--------+---------+
+| 1     | 1    | 1      | 1       |
++-------+------+--------+---------+
+
+Demonstration of simple table syntax.
 
 Multiline table with caption:
 
-> +----------+---------+-----------+--------------------------+
-> | Centered | Left    | Right     | Default aligned          |
-> | Header   | Aligned | Aligned   |                          |
-> +==========+=========+===========+==========================+
-> | First    | row     | 12.0      | Example of a row that    |
-> |          |         |           | spans multiple lines.    |
-> +----------+---------+-----------+--------------------------+
-> | Second   | row     | 5.0       | Here’s another one. Note |
-> |          |         |           | the blank line between   |
-> |          |         |           | rows.                    |
-> +----------+---------+-----------+--------------------------+
->
-> Here’s the caption. It may span multiple lines.
++----------+---------+-----------+--------------------------+
+| Centered | Left    | Right     | Default aligned          |
+| Header   | Aligned | Aligned   |                          |
++==========+=========+===========+==========================+
+| First    | row     | 12.0      | Example of a row that    |
+|          |         |           | spans multiple lines.    |
++----------+---------+-----------+--------------------------+
+| Second   | row     | 5.0       | Here’s another one. Note |
+|          |         |           | the blank line between   |
+|          |         |           | rows.                    |
++----------+---------+-----------+--------------------------+
+
+Here’s the caption. It may span multiple lines.
 
 Multiline table without caption:
 
-> +----------+---------+-----------+--------------------------+
-> | Centered | Left    | Right     | Default aligned          |
-> | Header   | Aligned | Aligned   |                          |
-> +==========+=========+===========+==========================+
-> | First    | row     | 12.0      | Example of a row that    |
-> |          |         |           | spans multiple lines.    |
-> +----------+---------+-----------+--------------------------+
-> | Second   | row     | 5.0       | Here’s another one. Note |
-> |          |         |           | the blank line between   |
-> |          |         |           | rows.                    |
-> +----------+---------+-----------+--------------------------+
++----------+---------+-----------+--------------------------+
+| Centered | Left    | Right     | Default aligned          |
+| Header   | Aligned | Aligned   |                          |
++==========+=========+===========+==========================+
+| First    | row     | 12.0      | Example of a row that    |
+|          |         |           | spans multiple lines.    |
++----------+---------+-----------+--------------------------+
+| Second   | row     | 5.0       | Here’s another one. Note |
+|          |         |           | the blank line between   |
+|          |         |           | rows.                    |
++----------+---------+-----------+--------------------------+
 
 Table without column headers:
 
-> +-----+-----+-----+-----+
-> | 12  | 12  | 12  | 12  |
-> +-----+-----+-----+-----+
-> | 123 | 123 | 123 | 123 |
-> +-----+-----+-----+-----+
-> | 1   | 1   | 1   | 1   |
-> +-----+-----+-----+-----+
++-----+-----+-----+-----+
+| 12  | 12  | 12  | 12  |
++-----+-----+-----+-----+
+| 123 | 123 | 123 | 123 |
++-----+-----+-----+-----+
+| 1   | 1   | 1   | 1   |
++-----+-----+-----+-----+
 
 Multiline table without column headers:
 
-> +----------+---------+-----------+--------------------------+
-> | First    | row     | 12.0      | Example of a row that    |
-> |          |         |           | spans multiple lines.    |
-> +----------+---------+-----------+--------------------------+
-> | Second   | row     | 5.0       | Here’s another one. Note |
-> |          |         |           | the blank line between   |
-> |          |         |           | rows.                    |
-> +----------+---------+-----------+--------------------------+
++----------+---------+-----------+--------------------------+
+| First    | row     | 12.0      | Example of a row that    |
+|          |         |           | spans multiple lines.    |
++----------+---------+-----------+--------------------------+
+| Second   | row     | 5.0       | Here’s another one. Note |
+|          |         |           | the blank line between   |
+|          |         |           | rows.                    |
++----------+---------+-----------+--------------------------+