Search failure

[Moon at MIT-AI (David A. Moon)]

I see, String Search prints search-failed over its echo, but Character Search just beeps.
The thing I was actually complaining about was repeating a search via ^S^S and getting
nothing but a beep, rather than an echo of the search string.

Probably they should both print search-failed and both do it via typein-line-more so
it doesn't clobber the echo.  And if the echo hasn't already come out it should come
out before search-failed.