diff --git a/launch_ros/doc/conf.py b/launch_ros/doc/conf.py
index 2eb3a644..0acfcb4d 100644
--- a/launch_ros/doc/conf.py
+++ b/launch_ros/doc/conf.py
@@ -1,10 +1,24 @@
+# Copyright 2024 R. Kent James
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # -- Path setup --------------------------------------------------------------
 
 import sys
 
 # -- Project information -----------------------------------------------------
 
-copyright = 'The <launch_ros> Contributors. License: Apache License 2.0'
+copyright = 'The <launch_ros> Contributors. License: Apache License 2.0'  # noqa A001
 
 # -- General configuration ---------------------------------------------------
 
@@ -21,20 +35,20 @@
 from sphinx.ext.autodoc.mock import mock
 
 with mock(['launch']):
-    import launch
+    import launch  # noqa F401
     module = sys.modules['launch']
 sys.modules['launch'] = module
 
 with mock(['launch.frontend']):
-    import launch.frontend
+    import launch.frontend  # noqa F401
     module = sys.modules['launch.frontend']
     # These are dummy decorators
-    module.expose_action = lambda _: lambda _:_
-    module.expose_substitution = lambda _: lambda _:_
+    module.expose_action = lambda _: lambda _: _
+    module.expose_substitution = lambda _: lambda _: _
 sys.modules['launch.frontend'] = module
 
 with mock(['launch.some_substitutions_type']):
-    import launch.some_substitutions_type
+    import launch.some_substitutions_type  # noqa F401
     module = sys.modules['launch.some_substitutions_type']
     module.SomeSubstitutionsType_types_tuple = ()
 sys.modules['launch.some_substitutions_type'] = module