with a pipe (|) symbol, rather than a '-'. This accomplishes 2 things:
- code:args can be used again with format-modifiers as pipe (|) is an illegal
  filename char in all supported OSes.
- multiple format modifers can be specified for some may (now) be combined.

* New format modifier 'T' (for thousands separated), adds separator (,) between
  thousands in numeric expanded @-codes. May be combined with other format
  modifiers when using the pipe-syntax (not the dash).