[docs] [issue21558] Fix a typo in the contextlib docs

[Berker Peksag]

New submission from Berker Peksag:

>From the code example at https://docs.python.org/3.5/library/contextlib.html#supporting-a-variable-number-of-context-managers

"if need_special resource:" (see line 4) should be "if need_special_resource:".

Related changeset: http://hg.python.org/cpython/rev/5d91d87b5969

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assignee: docs at python
components: Documentation
files: contextlib-typo.diff
keywords: patch
messages: 218944
nosy: berker.peksag, docs at python
priority: normal
severity: normal
stage: patch review
status: open
title: Fix a typo in the contextlib docs
versions: Python 3.4, Python 3.5
Added file: http://bugs.python.org/file35322/contextlib-typo.diff

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<http://bugs.python.org/issue21558>
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