Fix lint issues.

Author: Juan Tirado

juju/client/facade.py

@@ -687,7 +687,7 @@ def from_json(cls, data):
                     d[key] = value
                 else:
                     # something like k8s-api
-                    d[entry]=''
+                    d[entry] = ''
             return cls(**d)
         return None