Fixed looks_like_xml's tag regex so it doesn't do inordinate amounts of backtracking (making it O(2^n))
Fixed looks_like_xml's tag regex so it doesn't do inordinate amounts of backtracking (making it O(2^n))

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