revision 4.7 of python-mode.el

(py-honor-comment-indentation, py-compute-indentation): Fix the
implementation to match the documentation for
py-honor-comment-indentation w.r.t. not nil or t value.  In that case
it should still ignore ## for indentation purposes.  Closes SF bug
#523825, w/ patch provided by Christian Stork (mod'd by Barry).

Python 2.2.1 candidate.