Fix for loop on get_value_or_default function

fastapi/utils.py

@@ -168,7 +168,7 @@ def get_value_or_default(
     Otherwise, the first item (a `DefaultPlaceholder`) will be returned.
     """
     items = (first_item,) + extra_items
-    for item in (first_item,) + items:
+    for item in items:
         if not isinstance(item, DefaultPlaceholder):
             return item
     return first_item