diff --git a/action.yml b/action.yml
index 852560b2..4e14d646 100644
--- a/action.yml
+++ b/action.yml
@@ -21,7 +21,7 @@ inputs:
     description: 'The tag name of the release to generate notes for.'
     required: true
   chapters:
-    description: 'An YAML array defining chapters and corresponding labels for categorization.'
+    description: 'An string representation of YAML array defining chapters and corresponding labels for categorization. (Created by used "|".)'
     required: false
     default: ''
   duplicity-scope:
diff --git a/release_notes_generator/action_inputs.py b/release_notes_generator/action_inputs.py
index 3b2b1872..283460fd 100644
--- a/release_notes_generator/action_inputs.py
+++ b/release_notes_generator/action_inputs.py
@@ -26,7 +26,6 @@
 from typing import Optional
 import yaml
 
-
 from release_notes_generator.utils.constants import (
     GITHUB_REPOSITORY,
     GITHUB_TOKEN,