How to test `font-lock-keywords` values for Emacs Lisp code
问题 I pose the question because I think both the question and possible answers might help Emacs users who write Lisp code that defines font-lock-keywords . I'm providing one answer that I think helps. I'm also interested in other answers. That variable's value is a list of expressions, each of which can specify one or more patterns to match or functions to perform matching, and one or more faces for highlighting the matching text. The possibilities for font-lock-keywords values are numerous and