Improve python code for missing suggestion

Include a missing suggestion in code already merged

Related-Blueprint: better-quotas

Change-Id: I5983ccf6e2f98d2df41403b3be06748d5556c181

diff --git a/neutron/quota/resource.py b/neutron/quota/resource.py
index 7068254c7dc4a39fea9b11308cef0a0a598f1709..4ebca3f029b715d4bab2e70d11d0af94fe144d96 100644 (file)
--- a/neutron/quota/resource.py
+++ b/neutron/quota/resource.py
@@ -194,7 +194,7 @@ class TrackedResource(BaseResource):
                            "on resource:%(resource)s"),
                           {'tenant_id': tenant_id, 'resource': self.name})
         self._out_of_sync_tenants |= dirty_tenants_snap
-        self._dirty_tenants = self._dirty_tenants - dirty_tenants_snap
+        self._dirty_tenants -= dirty_tenants_snap
 
     def _db_event_handler(self, mapper, _conn, target):
         try: