Formating.

bonobo/config/options.py

@@ -74,7 +74,6 @@ class Option:
         return self.default() if callable(self.default) else self.default
 
 
-
 class Method(Option):
     """
     A Method is a special callable-valued option, that can be used in three different ways (but for same purpose).

tests/test_config_method.py

@@ -15,6 +15,7 @@ class MethodBasedConfigurable(Configurable):
 
 def test_one_wrapper_only():
     with pytest.raises(ConfigurationError):
+
         class TwoMethods(Configurable):
             h1 = Method()
             h2 = Method()