Clean up docstrings

Author: macro1

simple_history/middleware.py

@@ -2,9 +2,11 @@
 
 
 class HistoryRequestMiddleware(object):
-    """Expose the request as a thread-friendly variable on the
-    HistoricalRecords class.
+    """Expose request to HistoricalRecords.
 
+    This middleware sets request as a local thread variable, making it
+    available to the model-level utilities to allow tracking of the
+    authenticated user making a change.
     """
 
     def process_request(self, request):

simple_history/models.py

@@ -225,10 +225,7 @@ def create_historical_record(self, instance, type):
                        history_user=history_user, **attrs)
 
     def get_history_user(self, instance):
-        """Use hints from the instance and middleware to identify the
-        user making the change.
-
-        """
+        """Get the modifying user from instance or middleware."""
         try:
             return instance._history_user
         except AttributeError: