* lisp/autorevert.el: Use 'minibuffer-message' to not obscure the prompt.

* lisp/autorevert.el: Use 'minibuffer-message' to not obscure the prompt.

* lisp/autorevert.el (auto-revert-handler): Use 'minibuffer-message'
instead of 'message'.  Call it from the original window's buffer
that in case of the minibuffer should be current, so
minibuffer-message could add a message to it.  (Bug#34614)

* lisp/emacs-lisp/ert-x.el (ert--make-message-advice): Add nil to
the list of values to not use for format-message, because
minibuffer-message calls 'message' with nil argument, and tests fail.