diff --git a/aider/args_formatter.py b/aider/args_formatter.py
index df8bfac39..1412ea53e 100644
--- a/aider/args_formatter.py
+++ b/aider/args_formatter.py
@@ -146,7 +146,7 @@ class YamlHelpFormatter(argparse.HelpFormatter):
             parts.append(f"#{switch}: {default}\n")
         elif action.nargs in ("*", "+") or isinstance(action, argparse._AppendAction):
             parts.append(f"#{switch}: xxx")
-            parts.append(f"## Specify multiple values like this:")
+            parts.append("## Specify multiple values like this:")
             parts.append(f"#{switch}: [xxx,yyyy,zzz]\n")
         else:
             parts.append(f"#{switch}: xxx\n")