[issue30841] A shadowing variable naming emitted for Python-ast.c

[Terry J. Reedy]

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


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nosy: +benjamin.peterson, brett.cannon, ncoghlan, yselivanov

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30841>
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