Christian Boos committed 58d33f5

Wiki tests: keep our custom test failure output even with Python 2.7

Python 2.7 introduces a `safe_repr(obj, short)` utility which may
truncate the output. This is all nice, but it messes up the custom
diff we produce in `WikiTestCase`, so we force it to ignore the
`short` flag.

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 import os
 import re
 import unittest
+# Python 2.7 `assertMultiLineEqual` calls `safe_repr(..., short=True)`
+# which breaks our custom failure display in WikiTestCase.
+    from unittest.util import safe_repr
+ = lambda obj, short: safe_repr(obj, False)
+except ImportError:
+    pass
 from datetime import datetime