Closes #15465: Clean up settings.py

netbox/utilities/string.py

@@ -1,5 +1,6 @@
 __all__ = (
     'title',
+    'trailing_slash',
 )
 
 
@@ -8,3 +9,10 @@ def title(value):
     Improved implementation of str.title(); retains all existing uppercase letters.
     """
     return ' '.join([w[0].upper() + w[1:] for w in str(value).split()])
+
+
+def trailing_slash(value):
+    """
+    Remove a leading slash (if any) and include a trailing slash, except for empty strings.
+    """
+    return f'{value.strip("/")}/' if value else ''