Fix PEP8 violations.

cms/startup.py

@@ -13,6 +13,7 @@ from monkey_patch import django_utils_translation
 import xmodule.x_module
 import cms.lib.xblock.runtime
 
+
 def run():
     """
     Executed during django startup

common/lib/xmodule/xmodule/html_module.py

@@ -71,7 +71,7 @@ class HtmlBlock(object):
         """
         if self.system.anonymous_student_id:
             return self.data.replace("%%USER_ID%%", self.system.anonymous_student_id)
-        return self.data  
+        return self.data
 
 
 class HtmlModuleMixin(HtmlBlock, XModule):
@@ -99,6 +99,7 @@ class HtmlModule(HtmlModuleMixin):
     Module for putting raw html in a course
     """
 
+
 class HtmlDescriptor(HtmlBlock, XmlDescriptor, EditingDescriptor):  # pylint: disable=abstract-method
     """
     Module for putting raw html in a course

common/lib/xmodule/xmodule/x_module.py

@@ -1216,6 +1216,7 @@ def descriptor_global_handler_url(block, handler_name, suffix='', query='', thir
     """
     raise NotImplementedError("Applications must monkey-patch this function before using handler_url for studio_view")
 
+
 # This function exists to give applications (LMS/CMS) a place to monkey-patch until
 # we can refactor modulestore to split out the FieldData half of its interface from
 # the Runtime part of its interface. This function matches the Runtime.local_resource_url interface

lms/djangoapps/course_api/blocks/transformers/student_view.py

@@ -21,7 +21,7 @@ class StudentViewTransformer(BlockStructureTransformer):
             block = block_structure.get_xblock(block_key)
 
             # We're iterating through descriptors (not bound to a user) that are
-            # given to us by the modulestore. The reason we look at 
+            # given to us by the modulestore. The reason we look at
             # block.__class__ is to avoid the XModuleDescriptor -> XModule
             # proxying that would happen if we just examined block directly,
             # since it's likely that student_view() is going to be defined on

lms/djangoapps/course_api/blocks/transformers/tests/test_student_view.py

@@ -6,7 +6,7 @@ from ..student_view import StudentViewTransformer
 
 
 class TestStudentViewTransformer(ModuleStoreTestCase):
-    
+
     def setUp(self):
         super(TestStudentViewTransformer, self).setUp()
         self.course_key = self.create_toy_course()

lms/djangoapps/lms_xblock/runtime.py

@@ -118,6 +118,7 @@ def handler_url(block, handler_name, suffix='', query='', thirdparty=False):
 
     return url
 
+
 def local_resource_url(block, uri):
     """
     local_resource_url for Studio

lms/envs/devstack.py

@@ -237,6 +237,6 @@ FEATURES['ENABLE_RENDER_XBLOCK_API'] = True
 
 
 CACHES['lms.course_blocks'] = {
-        'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
-        'KEY_FUNCTION': 'util.memcache.safe_key',
+    'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
+    'KEY_FUNCTION': 'util.memcache.safe_key',
 }