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

@@ -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/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