[docs] [issue16154] Some minor doc fixes in Doc/library

[Ravi Sinha]

Ravi Sinha added the comment:

I've used the testsetup directive and the problem in http://hg.python.org/cpython/file/40a1652349e9/Doc/library/math.rst, line 79, is fixed; the test passes

Added # doctest: +SKIP to lines 179 and 180 in http://hg.python.org/cpython/file/40a1652349e9/Doc/library/filecmp.rst, and it passes too

For http://hg.python.org/cpython/file/40a1652349e9/Doc/library/string.rst, lines 612-624, used +NORMALIZE_WHITESPACE and the test passed, but since Terry preferred a code change, did that too; the test passes

Put my name at the proper position in Misc/ACKS

For the multiple versions, I needed to ask whether they'd all belong to this same patch or there would be different patches for each version? Sorry if it's a silly question; I haven't had the time to wrap my head around how to best work with all the versions together 

With the directives Chris and Terry suggested, it should be easy to make several other tests pass; I'll make a few more patches

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Added file: http://bugs.python.org/file27574/doc_lib_Oct14_2012.patch

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<http://bugs.python.org/issue16154>
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