[issue9951] introduce bytes.hex method (also for bytearray and memoryview)

[Arnon Yaari]

Arnon Yaari added the comment:

minor updates to stdtypes.rst. I also want to add a line to whatsnew/3.5 but don't know how to put it in words - maybe it's better if someone with better english will add it.

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Added file: http://bugs.python.org/file39204/bytes.hex-1.diff

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