[issue27495] Pretty printing sorting for set and frozenset instances

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Since pprint() now supports all standard collections, I think it is worth to support them in saferepr() too. I have written an implementation and am finishing writing tests.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27495>
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