Fix up some comments:
Fix up some comments:

* tools/cvs2svn/cvs2svn.py
  (SymbolicNameTracker.finish): Describe branch source guarantees.
  (Commit.commit): Remove obsolete comment.
  (pass5): Russell Yanofsky confirmed that "<" redirection does work
    on Windows.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@846485 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion