remove unnecessary brackets

Author: Richard Jones

roundup/backends/rdbms_common.py

@@ -2729,7 +2729,7 @@ def get(self, nodeid, propname, default=_marker, cache=1):
         if propname == 'content':
             try:
                 return self.db.getfile(self.classname, nodeid, None)
-            except IOError, (strerror):
+            except IOError, strerror:
                 # BUG: by catching this we donot see an error in the log.
                 return 'ERROR reading file: %s%s\n%s\n%s'%(
                         self.classname, nodeid, poss_msg, strerror)