had double ^W/^V at outer level -- why?
  possibly so I could get :$ $ not to echo but text inside :$ $ to echo
  number of ^V/^W around crtsty command (to echo it) must match outer

return after outer ^V, near end of file, is needed to force return
 after DDT's (CRTSTY's?) echo of DHP$U
(in version described above, you have one or more ^Vs, then return,
 then end of file)
added :$*$ as last line, then whole thing echoes
so decided to use :terpri to force DHP$U to print return
and then separate :$ ^V * ^W $
and then final ^V with no return
that produces a nice prompt, but then _I_ hit return and I see another prompt
I really want to force DDT to print a prompt and reset its prompt state
:VK works -- also have ^V on the same line so the return is echoed --
 not sure if that's necessary though

if $U prints * after it's done, why don't I see it?  because I'm no longer
 using the same TTY as when the $U started?