OK, so it first looks for exact hits, then does a grep style match. And we see that
$ help f|grep :.
false: false
fc: fc [-e ename] [-lnr] [first] [last] or fc -s [pat=rep] [command]
fg: fg [job_spec]
for: for NAME [in WORDS ... ] ; do COMMANDS; done
for ((: for (( exp1; exp2; exp3 )); do COMMANDS; done
function: function name { COMMANDS ; } or name () { COMMANDS ; }
the function name is 'for (('
not 'for (( ))' etc.
Great.
