Merge pull request #2207 from BoboTiG/patch-1

Fix DeprecationWarning: invalid escape sequence in services.py

Author: shin-

docker/types/services.py

@@ -714,7 +714,7 @@ def __init__(self, nameservers=None, search=None, options=None):
 
 
 class Privileges(dict):
-    """
+    r"""
         Security options for a service's containers.
         Part of a :py:class:`ContainerSpec` definition.