[docs] [issue18705] Fix typos/spelling mistakes in Lib/*.py files

[Roundup Robot]

Roundup Robot added the comment:

New changeset d234dd21374a by Ezio Melotti in branch '2.7':
#18705: fix a number of typos.  Patch by Févry Thibault.
http://hg.python.org/cpython/rev/d234dd21374a

New changeset e07f104133d5 by Ezio Melotti in branch '3.3':
#18705: fix a number of typos.  Patch by Févry Thibault.
http://hg.python.org/cpython/rev/e07f104133d5

New changeset a9ee869cae40 by Ezio Melotti in branch 'default':
#18705: merge with 3.3.
http://hg.python.org/cpython/rev/a9ee869cae40

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nosy: +python-dev

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