* lisp/apropos.el (apropos-print): Now that `apropos-mode' inherits

from `special-mode', entering it makes the buffer read-only, so
call it only when everything has been already inserted.
* lisp/emacs-lisp/ert.el (ert--setup-results-buffer)
(ert-results-pop-to-backtrace-for-test-at-point)
(ert-results-pop-to-messages-for-test-at-point)
(ert-results-pop-to-timings): Ditto.
* lisp/emacs-lisp/package.el (package--list-packages): Ditto.
* lisp/play/solitaire.el (solitaire): Ditto.