[issue37032] Add CodeType.replace() method

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

> It's not like Python 3.8 is the first type in Python history that code constructor changed.

Oops, typo: It's not like Python 3.8 is the first *time* in Python history that the code constructor changed.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37032>
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