[issue15855] memoryview methods and data members are missing docstrings

[Alexander Belopolsky]

Alexander Belopolsky added the comment:

I am going to commit this tonight.  Stefan, please let me know if you have any comments.  I copied most of the descriptions from ReST manual with a few minor changes.  See shape/strides/suboffsets.

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stage:  -> commit review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15855>
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