Add double byte string format

tests/progress/progress_test.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env -S uv run --script
 
 """
 Test for progress class
@@ -89,3 +89,5 @@ def main():
 
 if __name__ == '__main__':
     main()
+
+# __END__