Fixed issue #8: slow performance in parsing inline literals in

RST reader.  The problem was that ``#`` was seen by
'inline' as a potential link or image.  Fix:  insert
'notFollowedBy (char '`')' in link parsers.


git-svn-id: https://pandoc.googlecode.com/svn/trunk@529 788f1e2b-df1e-0410-8736-df70ead52e1b

src/Text/Pandoc/Readers/RST.hs

@@ -603,6 +603,7 @@ link = choice [explicitLink, referenceLink, autoLink,
 
 explicitLink = try (do
   char '`'
+  notFollowedBy (char '`') -- `` is marks start of inline code
   label <- manyTill inline (try (do {spaces; char '<'}))
   src <- manyTill (noneOf ">\n ") (char '>')
   skipSpaces
@@ -625,6 +626,7 @@ anonymousLinkEnding = try (do
 
 referenceLink = try (do
   char '`'
+  notFollowedBy (char '`')
   label <- manyTill inline (char '`')
   char '_'
   src <- option (Ref []) anonymousLinkEnding