create
create

Was planning to use it as argument to rlwrap, though, and doesn't help
for terminating reading of stdin (in pipeline that ends in |less).
rename 'map' to 'on'
re-add 'map' as alias

Not actually sure I want to stay with 'on'. Use both names for
stdin/stdout vs args/stdout differentiation? Shell is difficult.
delete 'map' alias again, since I want to replace it with something else
rename