LaTeX reader: better handling of colwidths.

Previously the parser just failed if the column width
specified in `p{}` wasn't a multiple of `\linewidth`.
This led to cases where content was skipped.
Now we treat these as ColWidthDefault and silently
parse the table.

A future improvement could be to guess relative column
widths from the dimensions specified, based on a default
line width.

Closes #9579.

1 files changed, 6 insertions, 5 deletions

diff --git a/src/Text/Pandoc/Readers/LaTeX/Table.hs b/src/Text/Pandoc/Readers/LaTeX/Table.hs
index e6e3fc436..d2d8223d6 100644
--- a/src/Text/Pandoc/Readers/LaTeX/Table.hs
+++ b/src/Text/Pandoc/Readers/LaTeX/Table.hs
@@ -87,11 +87,12 @@ parseAligns = try $ do
   let alignPrefix = symbol '>' >> braced
   let alignSuffix = symbol '<' >> braced
   let colWidth = try $ do
-        symbol '{'
-        ds <- trim . untokenize <$> manyTill anyTok (controlSeq "linewidth")
-        spaces
-        symbol '}'
-        return $ safeRead ds
+        ts <- braced
+        let isLinewidth (Tok _ (CtrlSeq "linewidth") _) = True
+            isLinewidth _ = False
+        case break isLinewidth ts of
+          (ds, _:_) -> return $ safeRead $ trim $ untokenize ds
+          _ -> return Nothing
   let alignSpec = do
         pref <- option [] alignPrefix
         spaces