Code Review changes.

apps/openassessment/xblock/peer_assessment_mixin.py

@@ -12,7 +12,7 @@ class PeerAssessmentMixin(object):
 
     PeerAssessmentMixin is a Mixin for the OpenAssessmentBlock. Functions in
     the PeerAssessmentMixin call into the OpenAssessmentBlock functions and
-    will not work outside this scope.
+    will not work outside of OpenAssessmentBlock
 
     """
 

apps/openassessment/xblock/self_assessment_mixin.py

@@ -10,7 +10,7 @@ class SelfAssessmentMixin(object):
 
     SelfAssessmentMixin is a Mixin for the OpenAssessmentBlock. Functions in
     the SelfAssessmentMixin call into the OpenAssessmentBlock functions and
-    will not work outside this scope.
+    will not work outside of OpenAssessmentBlock.
 
     """
 

apps/openassessment/xblock/submission_mixin.py

@@ -11,7 +11,7 @@ class SubmissionMixin(object):
 
     SubmissionMixin is a Mixin for the OpenAssessmentBlock. Functions in the
     SubmissionMixin call into the OpenAssessmentBlock functions and will not
-    work outside this scope.
+    work outside the scope of OpenAssessmentBlock.
 
     """
 
@@ -49,6 +49,7 @@ class SubmissionMixin(object):
         student_item_dict = self.get_student_item_dict()
         prev_sub = self._get_user_submission(student_item_dict)
 
+
         if prev_sub:
             # It is an error to submit multiple times for the same item
             status_tag = 'ENOMULTI'