Markdown writer: prefer pipe_tables to raw html...

...even when we must lose width information.

All in all this seems to be people's preferred behavior, even though it
is slightly lossier.

Closes #2608.
Closes #4497.

src/Text/Pandoc/Writers/Markdown.hs

@@ -628,15 +628,15 @@ blockToMarkdown' opts t@(Table caption aligns widths headers rows) =  do
                writerColumns opts >= 8 * numcols -> (id,) <$>
                 gridTable opts blockListToMarkdown
                   (all null headers) aligns' widths' headers rows
-            | isEnabled Ext_raw_html opts -> fmap (id,) $
-                   (text . T.unpack) <$>
-                   (writeHtml5String opts{ writerTemplate = Nothing } $ Pandoc nullMeta [t])
             | hasSimpleCells &&
               isEnabled Ext_pipe_tables opts -> do
                 rawHeaders <- padRow <$> mapM (blockListToMarkdown opts) headers
                 rawRows <- mapM (fmap padRow . mapM (blockListToMarkdown opts))
                            rows
                 (id,) <$> pipeTable (all null headers) aligns' rawHeaders rawRows
+            | isEnabled Ext_raw_html opts -> fmap (id,) $
+                   (text . T.unpack) <$>
+                   (writeHtml5String opts{ writerTemplate = Nothing } $ Pandoc nullMeta [t])
             | otherwise -> return $ (id, text "[TABLE]")
   return $ nst (tbl $$ caption'') $$ blankline
 blockToMarkdown' opts (BulletList items) = do

test/command/3734.md

@@ -4,27 +4,9 @@
 |--------------|-------|--------------------------------------------------------------------------|
 | aaaaaaaaaaaa |       | cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc |
 ^D
-<table>
-<colgroup>
-<col style="width: 14%" />
-<col style="width: 7%" />
-<col style="width: 77%" />
-</colgroup>
-<thead>
-<tr class="header">
-<th>aaaaaaaaaaaa</th>
-<th>bbbbb</th>
-<th>ccccccccccc</th>
-</tr>
-</thead>
-<tbody>
-<tr class="odd">
-<td>aaaaaaaaaaaa</td>
-<td></td>
-<td>cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc</td>
-</tr>
-</tbody>
-</table>
+| aaaaaaaaaaaa | bbbbb | ccccccccccc                                                              |
+|--------------|-------|--------------------------------------------------------------------------|
+| aaaaaaaaaaaa |       | cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc |
 ```
 
 ```