-u 500 -o pid,ppid,fname,comm,args           # right margin trouble
-u 500 -o pid,ppid,fname,comm,args,wchan,wchan,wchan,wchan,wchan,nice,wchan
-u 500 -o pid,pid,pid,pid,user,user,user,args   # had trouble
-u 500 -o user,user,user,pid,pid,pid,pid,args   # no trouble!

Test with each type of field (RIGHT,LEFT,UNLIMITED...) hanging off the
edge of the screen and each type of field to the left of the one that
hangs off the edge.

Test "ps ef" as _both_ normal user and root. Especially after su!

On a 108-col screen, try "ps alx" and "ps alx | cat"

These ought to be the same:
CMD_ENV=old ps -m
CMD_ENV=old ps m

These ought to be the same:
CMD_ENV=old ps -X
CMD_ENV=old ps X
ps X
ps -X        # needs to be a non-SysV option

This should fail:
ps x -x