* lisp/emacs-lisp/find-func.el (find-function-advised-original): Look
at the actual function definition rather than
`advice--symbol-function` which sometimes returns only the advice.
* test/lisp/emacs-lisp/find-func-tests.el
(find-func-tests--find-library-verbose): Add test.
(dabbrev-expand-test, dabbrev-completion-test)
(dabbrev-completion-test-with-argument):
Use 'kbd' to format keys for 'execute-kbd-macro'.
(dabbrev-expand-test): Fix docstring.
* 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.
