diff --git a/docs/pip_sphinxext.py b/docs/pip_sphinxext.py
index 4d5a2f17238..16a3206da50 100644
--- a/docs/pip_sphinxext.py
+++ b/docs/pip_sphinxext.py
@@ -150,7 +150,7 @@ def _format_option(
             "",
             line,
             "",
-            "    " + opt_help,
+            f"    {opt_help}",
             "",
             f"    (environment variable: {env_var_names_src})",
             "",