wasnt -> wasn't

ss18 · ss18 · commit 2de145f37247 · 2019-08-01T15:10:06.000+02:00
diff --git a/testing/test_junitxml.py b/testing/test_junitxml.py
@@ -582,7 +582,7 @@ def test_hello():
         assert "hx" in fnode.toxml()
 
     def test_assertion_binchars(self, testdir):
-        """this test did fail when the escaping wasnt strict"""
+        """this test did fail when the escaping wasn't strict"""
         testdir.makepyfile(
             """
 
