[issue17714] str.encode('base64') add trailing new line character. It is not documented.

[Terry J. Reedy]

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


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assignee:  -> docs at python
components: +Documentation
nosy: +docs at python
stage:  -> needs patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17714>
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