add docstrings

common/lib/xmodule/xmodule/contentstore/content.py

@@ -60,10 +60,17 @@ class StaticContent(object):
 
     @staticmethod
     def is_c4x_path(path_string):
+        """
+        Returns a boolean if a path is believed to be a c4x link based on the leading element
+        """
         return path_string.startswith('/{0}/'.format(XASSET_LOCATION_TAG))
 
     @staticmethod
     def renamespace_c4x_path(path_string, target_location):
+        """
+        Returns an updated string which incorporates a new org/course in order to remap an asset path
+        to a new namespace
+        """
         location = StaticContent.get_location_from_path(path_string)
         location = location.replace(org=target_location.org, course=target_location.course)
         return StaticContent.get_url_path_from_location(location)