[issue17159] Remove explicit type check from inspect.Signature.from_function()

[Roundup Robot]

Roundup Robot added the comment:

New changeset fa5127cdfe9d by Yury Selivanov in branch '3.4':
inspect.signature: Check for function-like objects before builtins. Issue #17159
http://hg.python.org/cpython/rev/fa5127cdfe9d

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<http://bugs.python.org/issue17159>
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