[docs] [issue30178] Indent methods and attributes of MimeTypes class

[Mariatta Wijaya]

Changes by Mariatta Wijaya <mariatta.wijaya at gmail.com>:


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stage:  -> patch review
versions: +Python 2.7, Python 3.5, Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30178>
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