* textmodes/ispell.el (ispell-check-version, ispell-send-string):

* textmodes/ispell.el (ispell-check-version, ispell-send-string):
* international/mule.el (load-with-code-conversion):
* emacs-lisp/debug.el (debug):
* ediff-vers.el (ediff-rcs-get-output-buffer):
* dired.el (dired-internal-noselect): Don't let-bind
default-major-mode around code that doesn't use it.
E.g. buffer creation via get-buffer-create doesn't use it.