Markdown reader: inline math must have nonspace before final $.

Closes #1313.

src/Text/Pandoc/Parsing.hs

@@ -464,11 +464,13 @@ mathInlineWith :: String -> String -> Parser [Char] st String
 mathInlineWith op cl = try $ do
   string op
   notFollowedBy space
-  words' <- many1Till (count 1 (noneOf "\n\\")
+  words' <- many1Till (count 1 (noneOf " \t\n\\")
                    <|> (char '\\' >> anyChar >>= \c -> return ['\\',c])
-                   <|> count 1 newline <* notFollowedBy' blankline
-                       *> return " ")
-              (try $ string cl)
+                   <|> do (blankline <* notFollowedBy' blankline) <|>
+                             (oneOf " \t" <* skipMany (oneOf " \t"))
+                          notFollowedBy (char '$')
+                          return " "
+                    ) (try $ string cl)
   notFollowedBy digit  -- to prevent capture of $5
   return $ concat words'
 

tests/markdown-reader-more.native

@@ -16,6 +16,8 @@
 ,Header 3 ("my-header",[],[]) [Str "my",Space,Str "header"]
 ,Header 2 ("in-math",[],[]) [Str "$",Space,Str "in",Space,Str "math"]
 ,Para [Math InlineMath "\\$2 + \\$3"]
+,Para [Str "This",Space,Str "should",Space,Str "not",Space,Str "be",Space,Str "math:"]
+,Para [Str "$PATH",Space,Str "90",Space,Str "$PATH"]
 ,Header 2 ("commented-out-list-item",[],[]) [Str "Commented-out",Space,Str "list",Space,Str "item"]
 ,BulletList
  [[Plain [Str "one",Space,RawInline (Format "html") "<!--\n- two\n-->"]]

tests/markdown-reader-more.txt

@@ -58,6 +58,10 @@
 
 $\$2 + \$3$
 
+This should not be math:
+
+$PATH 90 $PATH
+
 ## Commented-out list item
 
 - one