Realize unified comment args as advertised in docs (-- <comment>).
Change 'tickoff' to fixed arg order and add optional date and time arguments.
Add '-- <comment>' arg to 'tickoff'.
Make 'forge' name argument stricter: must exist, or provide 'new' argument.
Fix docs for 'new'
Fix test scripts for stricter 'forge' name arg.
Use 'tickoff' date arg in test script.
Fix 'tim <name> -- <comment>'.
Join comments with a '|' separator.
Change comment separator from '#' to '--' in timelogs and cmdline output.
Still permit timelog format with a '#' instead.
Adjust test script expectations concerning '#' and '--'.