[django/django] 865723: [1.6.x] Fixed set literals for python 2.6

[GitHub]

Branch: refs/heads/stable/1.6.x
Home: https://github.com/django/django
Commit: 865723f2670d7a7acf8e66a42d99cfb807cf9aac
https://github.com/django/django/commit/865723f2670d7a7acf8e66a42d99cfb807cf9aac
Author: Florian Apolloner <flo...@apolloner.eu>
Date: 2014-01-01 (Wed, 01 Jan 2014)

Changed paths:
M tests/mail/tests.py

Log Message:
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[1.6.x] Fixed set literals for python 2.6