[docs] [issue22088] base64 module still ignores non-alphabet characters

[Martin Panter]

Martin Panter added the comment:

While porting the Python 3 changes over, I noticed some related problems in the Python 2 and 3 documentation:

* Due to the internal alphabet translation, characters that are in the original base-64 alphabet (+ and /) are not discarded, even if an alternative alphabet is specified
* Doc strings of standard_ and urlsafe_b64decode() need fixing as well
* Found some copy-paste errors in the doc strings
* There are only two distinct base-64 alphabets defined by the RFCs, not three. The URL-safe alphabet and the filename-safe alphabet are the same thing.

Here is a patch for review. I will hold off on this until Issue 1753718 has been sorted out to avoid conflicts in the Python 3 docs.

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keywords: +patch
nosy: +martin.panter
stage:  -> patch review
versions: +Python 3.5, Python 3.6
Added file: http://bugs.python.org/file41301/base64-discard.patch

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<http://bugs.python.org/issue22088>
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