[issue15903] Make rawiobase_read() read directly to bytes object

[Richard Oudkerk]

Richard Oudkerk added the comment:

New patch which checks the refcount of the memoryview and bytes object after calling readinto().

If either refcount is larger than the expected value of 1, then the data is copied rather than resized.

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Added file: http://bugs.python.org/file27211/iobase_read.patch

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