[issue23216] IDLE grep/find/replace source code needs docstrings

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

There are several minor things to fix after this (and multiple issues), including the difference between find in search and replace.  It seems to me that is should be the same.  We will definitely need to test changes on both Windows and Linux.

The font color issue is essentially the one that resulted in white on white in the completions box.  We should always set both foreground and background to make sure consistent.  Another nit for followup.

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