[docs] [issue31778] ast.literal_eval supports non-literals in Python 3

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

PR 4035 makes ast.literal_eval() more strict.

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versions:  -Python 3.6, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31778>
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