update shutdown error to a DataError
@@ -1023,7 +1023,7 @@ class Redis(object):
attempted. The "save" and "nosave" options cannot both be set.
"""
if save and nosave:
- raise RedisError('SHUTDOWN save and nosave cannot both be set')
+ raise DataError('SHUTDOWN save and nosave cannot both be set')
args = ['SHUTDOWN']
if save:
args.append('SAVE')
