[issue13266] Add inspect.unwrap(f) to easily unravel "__wrapped__" chains

[Aaron Iles]

Aaron Iles added the comment:

I've updated the patch for the current default branch (to be Python 3.4) and added documentation to the inspect module for the new unwraps function. Functionally unwraps and it's tests are unchanged.

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Added file: http://bugs.python.org/file27790/p13266-2.diff

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