Fix typo in `format_string` docstring (GH-136742)

diff --git a/Lib/locale.py b/Lib/locale.py
index 37cafb4a601b3c2c153d9763c4ec95a01709c328..0f1b429ea419b02965184836726123985aa437ae 100644 (file)
--- a/Lib/locale.py
+++ b/Lib/locale.py
@@ -214,7 +214,7 @@ def format_string(f, val, grouping=False, monetary=False):
 
     Grouping is applied if the third parameter is true.
     Conversion uses monetary thousands separator and grouping strings if
-    forth parameter monetary is true."""
+    fourth parameter monetary is true."""
     global _percent_re
     if _percent_re is None:
         import re