Fix spelling of permission.

lms/djangoapps/courseware/tests/test_discussion_xblock.py

@@ -176,13 +176,13 @@ class TestViews(TestDiscussionXBlock):
         permission_dict = {
             'create_thread': permissions[0],
             'create_comment': permissions[1],
-            'create_subcomment': permissions[2]
+            'create_sub_comment': permissions[2]
         }
 
         expected_permissions = {
             'can_create_thread': permission_dict['create_thread'],
             'can_create_comment': permission_dict['create_comment'],
-            'can_create_subcomment': permission_dict['create_subcomment'],
+            'can_create_subcomment': permission_dict['create_sub_comment'],
         }
 
         self.block.has_permission = lambda perm: permission_dict[perm]
@@ -236,7 +236,7 @@ class TestTemplates(TestDiscussionXBlock):
         permission_dict = {
             'create_thread': permissions[0],
             'create_comment': permissions[1],
-            'create_subcomment': permissions[2]
+            'create_sub_comment': permissions[2]
         }
 
         self.block.has_permission = lambda perm: permission_dict[perm]

openedx/core/lib/xblock_builtin/xblock_discussion/xblock_discussion.py

@@ -117,7 +117,7 @@ class DiscussionXBlock(XBlock, StudioEditableXBlockMixin, XmlParserMixin):
             'course_id': self.course_key,
             'can_create_thread': self.has_permission("create_thread"),
             'can_create_comment': self.has_permission("create_comment"),
-            'can_create_subcomment': self.has_permission("create_subcomment"),
+            'can_create_subcomment': self.has_permission("create_sub_comment"),
         }
 
         fragment.add_content(self.runtime.render_template('discussion/_discussion_inline.html', context))