[docs] [issue28587] list.index documentation missing start and stop arguments

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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assignee: docs at python -> rhettinger
nosy: +rhettinger

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28587>
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