s/nt.assert_not_equals/nt.assert_not_equal/

IPython/testing/tests/test_decorators.py

@@ -180,9 +180,9 b' def test_linux():'
 
 @dec.skip_win32
 def test_win32():
-    nt.assert_not_equals(sys.platform,'win32',"This test can't run under windows")
+    nt.assert_not_equal(sys.platform,'win32',"This test can't run under windows")
 
 @dec.skip_osx
 def test_osx():
-    nt.assert_not_equals(sys.platform,'darwin',"This test can't run under osx")
+    nt.assert_not_equal(sys.platform,'darwin',"This test can't run under osx")