Don't mess with *temp*.

Don't mess with *temp*.
* lisp/obsolete/spell.el: Move from textmodes/spell.el.
(spell-string):
* lisp/term.el (term-read-input-ring):
* lisp/startup.el (display-startup-echo-area-message):
* lisp/progmodes/antlr-mode.el (antlr-directory-dependencies):
* lisp/gnus/message.el (message-mailer-swallows-blank-line):
* lisp/comint.el (comint-read-input-ring): Use with-temp-buffer.
* lisp/international/mule.el (ctext-pre-write-conversion):
Don't hardcode point-min==1.
* lisp/gnus/mm-util.el (mm-find-buffer-file-coding-system): Don't forget to
kill the temp buffer.