* lisp/isearch.el (isearch-mode-map): Bind `C-x 8 RET' to

* lisp/isearch.el (isearch-mode-map): Bind `C-x 8 RET' to
`isearch-insert-char-by-name'.
(with-isearch-suspended): New defmacro with body mostly from
`isearch-edit-string' except the part that sets
`isearch-new-string' and `isearch-new-message'.
(isearch-edit-string): Use new macro `with-isearch-suspended' with
body that sets `isearch-new-string' and `isearch-new-message'.
(isearch-insert-char-by-name): New command.
* lisp/international/mule-cmds.el (read-char-by-name): Let-bind
`enable-recursive-minibuffers' to t.
http://lists.gnu.org/archive/html/emacs-devel/2012-12/msg00234.html