[issue20923] [doc] Explain ConfigParser 'valid section name' and .SECTCRE

[miss-islington]

miss-islington <mariatta.wijaya+miss-islington at gmail.com> added the comment:


New changeset a7af34d407b344de7f138c002854a3e16ecb9db5 by Miss Islington (bot) in branch '3.10':
[3.10] bpo-20923 : [doc] Explain ConfigParser 'valid section name'  and .SECTCRE (GH-31413) (GH-31506)
https://github.com/python/cpython/commit/a7af34d407b344de7f138c002854a3e16ecb9db5


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<https://bugs.python.org/issue20923>
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