Rework proc_name_arg:
- Remove the side effect of modifying the argument list. - Change it to accept the argument, not the argument list. - Make it intern the argument name, since all callers did that. - Rename to intern_proc_name_arg to reflect the new behavior.
Authored by: david_costanzo 2026-05-28
Parent: [r6234]
Child: [r6236]
