(query-replace-descr): New fun.

(query-replace-descr): New fun.
(query-replace-read-from, query-replace-read-args): Default to the last from&to.
(query-replace-read-to): Quote the `from' string when displaying it.
(query-replace-regexp-eval): Immediately check read-only status.
Use query-replace-read-from to get the \n checking.
Quote the `from' string when displaying it.
(map-query-replace-regexp, occur-read-primary-args):
Quote the `from' string when displaying it.