* ***- #H break
* break #H break
*command
**
Form:           PROMPT  "PROMPT,RING/S"
Purpose:        To change the prompt in the current CLI.
Author:         RDE (RING keyword by NJO)
Specification:
   If no parameter is given, then the prompt is reset to the
standard string ("> ").
   If RING is specified, then the prompt is set to the standard ring prompt
for this machine: "{machine name}-%n> ".
   Otherwise, the prompt is set to the supplied string.  The CLI
uses WRITEF to output the prompt, with arguments task id, hours, and
minutes (of time of day), so the string may usefully contain WRITEF
substitution sequences.
Example:        PROMPT
                PROMPT "%n> "
                PROMPT RING


