diff --git a/docs/sphinxext/autodoc_traits.py b/docs/sphinxext/autodoc_traits.py
index 5ddeb197..516156cd 100644
--- a/docs/sphinxext/autodoc_traits.py
+++ b/docs/sphinxext/autodoc_traits.py
@@ -7,14 +7,18 @@ from sphinx.ext.autodoc import ClassDocumenter, AttributeDocumenter
 
 class ConfigurableDocumenter(ClassDocumenter):
     """Specialized Documenter subclass for traits with config=True"""
+
     objtype = 'configurable'
     directivetype = 'class'
 
     def get_object_members(self, want_all):
         """Add traits with .tag(config=True) to members list"""
         check, members = super().get_object_members(want_all)
-        get_traits = self.object.class_own_traits if self.options.inherited_members \
-                     else self.object.class_traits
+        get_traits = (
+            self.object.class_own_traits
+            if self.options.inherited_members
+            else self.object.class_traits
+        )
         trait_members = []
         for name, trait in sorted(get_traits(config=True).items()):
             # put help in __doc__ where autodoc will look for it
@@ -42,10 +46,7 @@ class TraitDocumenter(AttributeDocumenter):
             default_s = ''
         else:
             default_s = repr(default)
-        sig = ' = {}({})'.format(
-            self.object.__class__.__name__,
-            default_s,
-        )
+        sig = ' = {}({})'.format(self.object.__class__.__name__, default_s)
         return super().add_directive_header(sig)