This is a fast, simple diff command which doesn't give up
until memory runs out. It needs enough memory to hold
all the differing lines from both files since the last
time synch was lost.

It takes order (n + m^3) time where n is the total number of lines
in both files and m is the number of differing lines. This may
seem slow but typically m is much less than n, and so things
aren't so bad.

Also it's written in assembly w/ all the longwords long-word aligned
for 68020's and higher. It needs just a 68000 and 2.04 or higher---
the longword alignment is just a bonus for 32bit machines.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 1367    1908  71.6% -lh5- d2b0 Oct 27  1992 FDiff
[generic]                 1369    2759  49.6% -lh5- 02cc Oct 27  1992 FDiff.doc
[generic]                  329     849  38.8% -lh5- 81c2 Oct 27  1992 FDiff.doc.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         3 files    3065    5516  55.6%            Feb  3  1993