fix pep8 violations

cms/djangoapps/contentstore/views/preview.py

@@ -160,7 +160,7 @@ def load_preview_module(request, preview_id, descriptor):
     module.get_html = replace_static_urls(
         module.get_html,
         getattr(module, 'data_dir', module.location.course),
-        course_id=module.location.org+'/'+module.location.course+'/BOGUS_RUN_REPLACE_WHEN_AVAILABLE'
+        course_id=module.location.org + '/' + module.location.course + '/BOGUS_RUN_REPLACE_WHEN_AVAILABLE'
     )
 
     module.get_html = save_module(

common/lib/xmodule/xmodule/modulestore/__init__.py

@@ -395,7 +395,7 @@ class ModuleStore(object):
 
     def get_modulestore_type(self, course_id):
         """
-        Returns a type which identifies which modulestore is servicing the given 
+        Returns a type which identifies which modulestore is servicing the given
         course_id. The return can be either "xml" (for XML based courses) or "mongo" for MongoDB backed courses
         """
         raise NotImplementedError

common/lib/xmodule/xmodule/modulestore/tests/test_split_modulestore.py

@@ -298,14 +298,15 @@ class SplitModuleItemTests(SplitModuleTest):
 
         # in published course
         locator = BlockUsageLocator(course_id="wonderful", usage_id="head23456", branch='draft')
-        self.assertTrue(modulestore().has_item(locator.course_id, BlockUsageLocator(course_id=locator.course_id,
-                                                                            usage_id=locator.usage_id,
-                                                                            branch='published')),
-                        "couldn't find in 23456")
+        self.assertTrue(
+            modulestore().has_item(
+                locator.course_id,
+                BlockUsageLocator(course_id=locator.course_id, usage_id=locator.usage_id, branch='published')
+            ), "couldn't find in 23456"
+        )
         locator.branch = 'published'
         self.assertTrue(modulestore().has_item(course_id, locator), "couldn't find in 23456")
 
-
     def test_negative_has_item(self):
         # negative tests--not found
         # no such course or block

common/lib/xmodule/xmodule/modulestore/xml.py

@@ -604,7 +604,7 @@ class XMLModuleStore(ModuleStoreBase):
 
     def get_modulestore_type(self, course_id):
         """
-        Returns a type which identifies which modulestore is servicing the given 
+        Returns a type which identifies which modulestore is servicing the given
         course_id. The return can be either "xml" (for XML based courses) or "mongo" for MongoDB backed courses
         """
         return XML_MODULESTORE_TYPE