[BRLTTY] Command learn mode

[Lee Maschmeyer]

It seems some keys on the BC640 don't produce correct text in command
learn mode. These seem especially to be chord commands. Space+dots123
is the Home command but in learn mode it just says "code".

-- 

Lee Maschmeyer

"Never imagine yourself not to be otherwise than what it might appear
to others that what you were or might have been was not otherwise than
what you had been would have appeared to them to be otherwise."
     --Lewis Carroll