PEP8 cleanups, specially E501 line too long.

mayan/apps/common/utils.py

@@ -37,7 +37,8 @@ def copyfile(source, destination, buffer_size=1024 * 1024):
 def encapsulate(function):
     # Workaround Django ticket 15791
     # Changeset 16045
-    # http://stackoverflow.com/questions/6861601/cannot-resolve-callable-context-variable/6955045#6955045
+    # http://stackoverflow.com/questions/6861601/
+    # cannot-resolve-callable-context-variable/6955045#6955045
     return lambda: function