The edit chains the keymap mred:global-search-keymap to its
keymap and calls mred:set-keymap-error-handler and
mred:set-keymap-implied-shifts on the keymap.
(make-object mred:searching-edit% line-spacingtabstopsnumtabs)->mred:searching-edit% object line-spacing = 1.0 : inexact real tabstops = null : boxed inexact real or null numtabs = 0 : small integer
Initializes the buffer's keymap, calling
mred:set-keymap-error-handler,
mred:set-keymap-implied-shifts,
and (send keymap chain-to-keymap mred:global-keymap #f).