emacs-style editing (which it used to have for a long time already).
Also mention the `gdb' and `help' commands. Other commands need an
overhaul, too (like the various `show' subcommands), but i don't feel
very competent for these.
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
