* lisp/emacs-lisp/find-func.el (find-function-search-for-symbol): If
our regexp algorithm could not find a location for the symbol
definition, resort to find-function--search-by-expanding-macros.
* test/lisp/emacs-lisp/find-func-tests.el: Add a automatic test for a
function and variable generated by a macro.
* etc/NEWS: Advertise the improved functionality (bug#45443).
* lisp/emacs-lisp/ert-x.el (ert-simulate-keys): New macro.
* test/lisp/international/mule-tests.el
(mule-cmds--test-universal-coding-system-argument): Use it and enable
the test also in batch mode.
