[django/django] de3a30: [1.7.x] Fix Python 3 incompatability

[GitHub]

Branch: refs/heads/stable/1.7.x
Home: https://github.com/django/django
Commit: de3a3096d89581729d140172a50b3aab6541710f
https://github.com/django/django/commit/de3a3096d89581729d140172a50b3aab6541710f
Author: Andrew Godwin <and...@aeracode.org>
Date: 2014-09-05 (Fri, 05 Sep 2014)

Changed paths:
M tests/migrations/test_graph.py

Log Message:
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[1.7.x] Fix Python 3 incompatability