Fix issue with flake8's B902

The ``classproperty`` decorator is provided by Django, so B902 is silenced
for the respective class method implementation and its test code.

Author: Mischback

calingen/interfaces/plugin_api.py

@@ -251,7 +251,7 @@ class LayoutProvider(metaclass=PluginMount):
     """
 
     @classproperty
-    def title(cls):
+    def title(cls):  # noqa: B902
         """Return the plugin's human-readable title.
 
         Returns
@@ -268,6 +268,9 @@ def title(cls):
         different way, it may provide a specific implementation of this method
         or provide a plain ``title`` class attribute, resolving to a
         :py:obj:`str` (TODO: NEEDS VERIFICATION!).
+
+        The ``classproperty`` decorator is provided by Django, so B902 is
+        disabled on this.
         """
         return "{} ({}, {})".format(cls.name, cls.paper_size, cls.orientation)
 

tests/interfaces/test_plugin_api.py

@@ -96,7 +96,9 @@ def test_list_available_plugins(self):
 
         class LayoutProviderTestImplementation_list_plugins_test(LayoutProvider):
             @classproperty
-            def title(cls):
+            def title(cls):  # noqa: B902
+                # The ``classproperty`` decorator is provided by Django, so
+                # B902 is disabled here.
                 return test_implementation_title
 
         # Act (actually perform what has to be done)