diff --git a/fastapi/openapi/docs.py b/fastapi/openapi/docs.py
index 227f39dcfe..3ddb8954d1 100644
--- a/fastapi/openapi/docs.py
+++ b/fastapi/openapi/docs.py
@@ -133,7 +133,9 @@ def get_swagger_ui_html(
js_urls = [swagger_js_url]
if swagger_extra_js_urls:
js_urls.extend(swagger_extra_js_urls)
- scripts_str = "\n ".join(f'' for js_url in js_urls)
+ scripts_str = "\n ".join(
+ f'' for js_url in js_urls
+ )
html = f"""