For example: "shoes ($20) and socks ($5)."
The fix consists in two new restrictions:
+ the $ that ends a math span may not be directly followed by a digit.
+ no blank lines may be included within a math span.
Thanks to Joseph Reagle for noticing the bug.
git-svn-id: https://pandoc.googlecode.com/svn/trunk@1326 788f1e2b-df1e-0410-8736-df70ead52e1b