[issue22823] Use set literals instead of creating a set from a list

[Roundup Robot]

Roundup Robot added the comment:

New changeset b6e6a86a92a7 by Serhiy Storchaka in branch 'default':
Issue #22823: Use set literals instead of creating a set from a list.
https://hg.python.org/cpython/rev/b6e6a86a92a7

New changeset 86a694781bee by Serhiy Storchaka in branch '3.4':
Issue #22823: Fixed an output of sets in examples.
https://hg.python.org/cpython/rev/86a694781bee

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<http://bugs.python.org/issue22823>
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