[docs] [issue25523] Correct "a" article to "an" article

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Here is a patch with additional changes.

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resolution: fixed -> 
stage: resolved -> patch review
status: closed -> open
Added file: http://bugs.python.org/file40925/a-an_2.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25523>
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