Ref T13202. See PHI886. Two minor issues here:
- I translated the double quoted string regexp incorrectly; we don't need to include backslash ("\") in the last character class. With it included, we failed to match "\n". We now match "\n" as a complete string literal correctly.
- The class for "t" should be "kt", i.e. "Keyword.Type". For now, this is pretty informal; some day it will presumably be better formalized.
