Fixed unit tests broken due to rebase on stable branch

tests/test_parser.py

@@ -92,7 +92,7 @@ class TestParser(RulesTestCase):
         x = tree('x')
 
         self.assertEqual(tree('sin x'), sin(x))
-        self.assertEqual(tree('sin 2 x'), sin(2) * x)  # FIXME: correct?
+        self.assertEqual(tree('sin 2 x'), sin(2) * x)
         self.assertEqual(tree('sin x ^ 2'), sin(x ** 2))
         self.assertEqual(tree('sin^2 x'), sin(x) ** 2)
 
@@ -101,12 +101,12 @@ class TestParser(RulesTestCase):
 
         self.assertEqual(tree('sin cos x'), sin(cos(x)))
         self.assertEqual(tree('sin cos x ^ 2'), sin(cos(x ** 2)))
-        self.assertEqual(tree('sin cos(x) ^ 2'), sin(cos(x ** 2)))
-        self.assertEqual(tree('sin (cos x) ^ 2'), sin(cos(x) ** 2))
-
+        self.assertEqual(tree('sin cos(x) ^ 2'), sin(cos(x) ** 2))
+        self.assertEqual(tree('sin (cos x) ^ 2'), sin(cos(x)) ** 2)
         self.assertEqual(tree('sin (cos x) ^ 2'), sin(cos(x)) ** 2)
         self.assertEqual(tree('sin((cos x) ^ 2)'), sin(cos(x) ** 2))
 
+
     def test_brackets(self):
         self.assertEqual(*tree('[x], x'))
         self.assertEqual(*tree('[x], (x)'))