Terry,
   On my Mac with "hg revert -a" and "hg pull -u" the patch fails to apply on CallTips.py and PathBrowser.py under the latest version of Python 3.4.  Here is the output when I try to apply the patch:

rovitotv-pc:py34 rovitotv$ hg import --no-commit /Volumes/SecurePython3/source/15392idletests.diff 
applying /Volumes/SecurePython3/source/15392idletests.diff
patching file Lib/idlelib/CallTips.py
Hunk #1 FAILED at 263
1 out of 1 hunks FAILED -- saving rejects to file Lib/idlelib/CallTips.py.rej
patching file Lib/idlelib/Itest/@template.txt
patching file Lib/idlelib/Itest/__init__.py
patching file Lib/idlelib/Itest/test_calltips.py
patching file Lib/idlelib/Itest/test_pathbrowser.py
patching file Lib/idlelib/PathBrowser.py
Hunk #1 FAILED at 94
1 out of 1 hunks FAILED -- saving rejects to file Lib/idlelib/PathBrowser.py.rej
patching file Lib/test/test_idle.py
adding Lib/idlelib/Itest/@template.txt
adding Lib/idlelib/Itest/__init__.py
adding Lib/idlelib/Itest/test_calltips.py
adding Lib/idlelib/Itest/test_pathbrowser.py
adding Lib/test/test_idle.py
abort: patch failed to apply
 
I even tried using the tr command to remove the ^M characters from the .diff file and that still didn't allow me to apply the patch.  Maybe it is my setup???  It is late here so I am going to bed but will play with it some more tomorrow.  Thanks for your hard work, the patch looks like a good start. Thanks!