(cherry picked from commit 054e09147a)
* bpo-30290: IDLE: Refactor help_about to PEP8 names (#1714)
Patch by Cheryl Sabella.
(cherry picked from commit 5a346d5dbc)
* IDLE test_help_about: edit and add test. (#1838)
Coverage is now 100%
(cherry picked from commit eca7da0f13)
This follows the previous patch that changed idlelib file names.
Class names that matched old module names are not changed.
Change idlelib imports in turtledemo.__main__.
Exception: config-extensions.def. Previously, extension section
names, file names, and class names had to match. Changing section
names would create cross-version conflicts in config-extensions.cfg
(user customizations). Instead map old names to new file names
at point of import in editor.EditorWindow.load_extension.
Patch extensively tested with test_idle, idle_test.htest.py, a custom
import-all test, running IDLE in a console to catch messages,
and testing each menu item. Based on a patch by Al Sweigart.
Terry Jan Reedy