Allow an optional colon after the closing bracket of definition lists

This is to disambiguate them from markdown links and will be require
with a future release.

1 files changed, 1 insertions, 1 deletions

diff --git a/haddock-library/src/Documentation/Haddock/Parser.hs b/haddock-library/src/Documentation/Haddock/Parser.hs
index ff03c7bb..99010897 100644
--- a/haddock-library/src/Documentation/Haddock/Parser.hs
+++ b/haddock-library/src/Documentation/Haddock/Parser.hs
@@ -294,7 +294,7 @@ definitionList :: Parser (DocH mod Identifier)
 definitionList = DocDefList <$> p
   where
     p = do
-      label <- "[" *> (parseStringBS <$> takeWhile1 (`notElem` "]\n")) <* "]"
+      label <- "[" *> (parseStringBS <$> takeWhile1 (`notElem` "]\n")) <* ("]" <* optional ":")
       c <- takeLine
       (cs, items) <- more p
       let contents = parseString . dropNLs . unlines $ c : cs