Changed the deprecated (in Python 3) assertNotEquals to assertNotEqual everywhere.

pystache/loader.py

@@ -15,7 +15,6 @@ from pystache.locator import Locator
 
 # We make a function so that the current defaults take effect.
 # TODO: revisit whether this is necessary.
-# TODO: change assertNotEquals to assertNotEqual everywhere.
 
 def _make_to_unicode():
     def to_unicode(s, encoding=None):

pystache/tests/test_context.py

@@ -69,7 +69,7 @@ class GetValueTests(unittest.TestCase, AssertIsMixin):
             return "bar"
 
         item = {"foo": foo_callable}
-        self.assertNotEquals(_get_value(item, "foo"), "bar")
+        self.assertNotEqual(_get_value(item, "foo"), "bar")
         self.assertTrue(_get_value(item, "foo") is foo_callable)
 
     def test_dictionary__key_missing(self):