Merge pull request #46 from Axelrod-Python/issue-36

[#36] Fix typo

Author: drvinceknight

tests/test_strategies.py

@@ -7,4 +7,4 @@ def test_original_rank():
         for details in characteristics.values()
         if details['original_rank'] is not None]
 
-    assert sorted(ranks) = list(range(1, 63 + 1))
+    assert sorted(ranks) == list(range(1, 63 + 1))