Insert as much of a completion as is possible. Otherwise,
display a window containing a list of the possible completions of what
you have typed so far. For example, if the available choices are:
and you have typed an ‘f’, followed by TAB, this
would result in ‘fo’ appearing in the echo area, since
all of the choices which begin with ‘f’ continue with ‘o’.
Now if you type TAB again, Info will pop
up a window showing a node called ‘*Completions*’ which lists the
possible completions like this:
3 completions:
foliate food
forget
i.e., all of the choices which begin with ‘fo’.
Now, typing ‘l’ followed by ‘TAB’ results in ‘foliate’
appearing in the echo area, since that is the only choice which begins
with ‘fol’.