[docs] [issue27895] Spelling fixes

[Roundup Robot]

Roundup Robot added the comment:

New changeset 89ce78ce1bfa by Raymond Hettinger in branch 'default':
Issue #27895: Strengthen the dict reader tests.
https://hg.python.org/cpython/rev/89ce78ce1bfa

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27895>
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