[docs] [issue19980] Improve help('non-topic') response

Terry J. Reedy added the comment: help() uses lib/pydoc.py and pydoc tests are in test/test_pydoc.py I think tests for things help does that pydoc does not do (help on topics?) should be in site.py. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue19980> _______________________________________