I know the -s option should display longer arguments, but it doesn\'t work always (probably because of those curly brackets meaning array or nested arguments?).
-s
Here it is not length problem.
./term.c: tprintf(" %sopost %sisig %sicanon %secho ...}",
You can add here more flags if you want. The flags are defined in /usr/include/asm-generic/termbits.h