Add some punctuation to our grammar file.
Add some punctuation to our grammar file.

Grammar now understands '.' and ',' punctuation.

alechenninger/dartlang,thso/dartlang,agudulin/dartlang,agudulin/dartlang,thso/dartlang,dart-atom/dartlang,alechenninger/dartlang,dart-atom/dartlang,thso/dartlang,alechenninger/dartlang,agudulin/dartlang