Malformed rules cause poor highlighting on GitHub.com

[maxbrunsfeld]

These two rules contain a patterns property, but no end property:

• language-jison/grammars/jison.cson

  Line 35 in 7b43e22

  patterns: [

• language-jison/grammars/jison.cson

  Line 39 in 7b43e22

  patterns: [

These rules are not valid, because they cause the highlighter to push a new rule onto its stack which can never be popped off.

GitHub's engine used to allow this, but now it does not. See also textmate/textmate#1437.

[nwhetsell]

@maxbrunsfeld Thanks for getting to the bottom of this!