added failing test that ensures that named volume will not be printed with a mode suffix

Signed-off-by: stefan <[email protected]>

tests/acceptance/cli_test.py

@@ -222,7 +222,7 @@ class CLITestCase(DockerClientTestCase):
                 'other': {
                     'image': 'busybox:latest',
                     'command': 'top',
-                    'volumes': ['/data:rw'],
+                    'volumes': ['/data'],
                 },
             },
         }