Trivial code change to force code update in rt testing

node_modules in round-trip testing was out of date, which caused a lot of
apparent regressions. This trivial patch is mainly used to update rt testing.

* Update comment in parserTests.txt, and remove unnecessary self-executing
  function wrapper.

Change-Id: I8f251bdcc2a9928d32c63e0098315e1cfbc36664