fixup! review comments

common/lib/xmodule/xmodule/graders.py

@@ -120,7 +120,7 @@ def grader_from_conf(conf):
     This creates a CourseGrader from a configuration (such as in course_settings.py).
     The conf can simply be an instance of CourseGrader, in which case no work is done.
     More commonly, the conf is a list of dictionaries. A WeightedSubsectionsGrader
-    with AssignmentFormatGrader's will be generated. Every dictionary should contain
+    with AssignmentFormatGraders will be generated. Every dictionary should contain
     the parameters for making an AssignmentFormatGrader, in addition to a 'weight' key.
     """
     if isinstance(conf, CourseGrader):

common/lib/xmodule/xmodule/tests/test_graders.py

@@ -282,18 +282,18 @@ class GraderTest(unittest.TestCase):
         self.assertEqual(len(graded['section_breakdown']), 12 + 1)
 
     @ddt.data(
-        # empty
         (
+            # empty
             {},
             u"Configuration has no appropriate grader class."
         ),
-        # no min_count
         (
+            # no min_count
             {'type': "Homework", 'drop_count': 0},
             u"Configuration has no appropriate grader class."
         ),
-        # no drop_count
         (
+            # no drop_count
             {'type': "Homework", 'min_count': 0},
             u"__init__() takes at least 4 arguments (3 given)"
         ),