[issue45692] IDLE: define word/id chars in one place.

[Terry J. Reedy]

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

undo.py, line 254, alphanumeric

Used in immediately following lines to classify chars as 'alphanumeric', 'newline', or 'punctuation' (the default).  I believe I have only ever looked at this module to add the test code at the bottom.  In any case, I don't know the effect of calling non-ascii chars punctuation, but suspect it is not the best thing.  So I suspect that the autoexpand fix would be the best.

The classify method is only used on line 248 in the merge method above.
  self.classify(self.chars[-1]) != self.classify(cmd.chars)
merge() is only used on l.124 in addcmd.  

To figure out more, I would experiment identifiers without and with non-ascii and undo and redo and see what difference there is.

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<https://bugs.python.org/issue45692>
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