diff --git a/pelican/contents.py b/pelican/contents.py
index d175eb75..0769f875 100644
--- a/pelican/contents.py
+++ b/pelican/contents.py
@@ -548,7 +548,7 @@ class Content:
 
 
 class SkipStub(Content):
-    # Stub class representing content that should not be processed in any way
+    """Stub class representing content that should not be processed in any way."""
 
     def __init__(
         self, content, metadata=None, settings=None, source_path=None, context=None