-;; Naturally this requires that (a) major modes run `kill-all-local-variables',
-;; as they are supposed to do, and (b) the major mode is in place after the
-;; file is visited or the command that ran `kill-all-local-variables' has
-;; finished, whichever the sooner. Arguably, any major mode that does not
-;; follow the convension (a) is broken, and I can't think of any reason why (b)
-;; would not be met (except `gnudoit' on non-files). However, it is not clean.
-;;
-;; Probably the cleanest solution is to have each major mode function run some
-;; hook, e.g., `major-mode-hook', but maybe implementing that change is
-;; impractical. I am personally against making `setq' a macro or be advised,
-;; or have a special function such as `set-major-mode', but maybe someone can
-;; come up with another solution?
+;; Naturally this requires that major modes run `kill-all-local-variables'
+;; and `after-change-major-mode-hook', as they are supposed to. For modes
+;; that do not run `after-change-major-mode-hook' yet, `post-command-hook'
+;; takes care of things if the mode is set directly or indirectly by
+;; an interactive command; however, problems can occur if the mode is
+;; set by a timer or process: in that case, proper handling of Font Lock mode
+;; may be delayed until the next interactive command.