; * lisp/so-long.el: Backwards-compatibility fix for Emacs < 27

; * lisp/so-long.el: Backwards-compatibility fix for Emacs < 27

We support Emacs 24.4 and later (for ELPA releases), and ad-find-advice
only changed from a macro to a function in Emacs 27, so this change is
to restore compatibility with older versions where we do need the macro
definition loaded at byte-compilation time.

This effectively combines the related changes from:

- commit 986c12b20fa29c37f13563846fddf6edcd0b4945
- commit c221db0402031c23b983eea3a6bc129e5abb98f6

(cherry picked from commit 03a6d5a76331e814368f17a61718208242e44bee)