[docs] [issue31110] Small typo in plistlib docs

[cwee]

New submission from cwee:

Starting with 3.4, the docs for plistlib have had a typo:
https://docs.python.org/3.4/library/plistlib.html#plistlib.readPlist
https://docs.python.org/3.5/library/plistlib.html#plistlib.readPlist
https://docs.python.org/3.6/library/plistlib.html#plistlib.readPlist
https://docs.python.org/3.7/library/plistlib.html#plistlib.readPlist

Functions `readPlist` and `readPlistFromBytes` reference the `__getitem_` method, which should be `__getitem__`.

I'd be happy to submit a PR if there's a repo for the site's documentation.

----------
assignee: docs at python
components: Documentation
messages: 299668
nosy: cwee, docs at python
priority: normal
severity: normal
status: open
title: Small typo in plistlib docs
type: enhancement
versions: Python 3.4, Python 3.5, Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue31110>
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