[issue22702] to improve documentation for join() (str method)

[Raymond Hettinger]

Raymond Hettinger added the comment:

At least the "iterable iterable" should be fixed.  However, as Josh said, the proposed wording is verbose.  Aim for the smallest number of words that gets the job done.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22702>
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