[issue22083] IDLE: Refactor breakpoint related methods

[Terry J. Reedy]

Change by Terry J. Reedy <tjreedy at udel.edu>:


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title: Refactor PyShell's breakpoint related methods -> IDLE: Refactor breakpoint related methods
versions: +Python 3.9 -Python 2.7, Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue22083>
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