Fix adapter bug + regression test

Author: shin-

tests/integration_test.py

@@ -1477,7 +1477,6 @@ def test_649(self):
         self.client.start(ctnr)
         self.client.stop(ctnr)
 
-
 if __name__ == '__main__':
     c = docker.Client(base_url=DEFAULT_BASE_URL)
     c.pull('busybox')