Add a new test for the latest RegexLexer change, multiple new states including '#pop'.
Add a new test for the latest RegexLexer change, multiple new states
including '#pop'.

erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments