The EDIT.SAV executable you have is probably a rather
vanilla version
of TECO. Just to verify, try this (I use the convention that $ is
ESCAPE or ALTMODE):
As far as I know, EDIT was never a vanilla version of TECO... EDIT
was EDIT, TECO was TECO. EDIT did, however, look sort of like TECO
in that it had single-character and double-character commands with
arguments, ending with <ESCAPE>. But where, in TECO, you would
do 'LT', in EDIT you do 'AL'.
They are NOT the same program.
Later versions of RT-11 have an EDIT.SAV that is *not*
TECO. (For
a long time, TECO.SAV didn't come with the distribution media - at
least as an immediately obvious file - but as of 5.7 it's back.)