* lisp/subr.el (add-hook): Turn `append` into `depth` (bug#35508)
Make it possible to control the relative ordering of functions on hooks by specifying `depth` in the same was as was possible with `add-function`. * lisp/electric.el (electric--sort-post-self-insertion-hook): Delete function. (electric-indent-mode, electric-layout-mode, electric-quote-mode): * lisp/elec-pair.el (electric-pair-mode): Use new `depth` arg instead of electric--sort-post-self-insertion-hook. * lisp/emacs-lisp/syntax.el (syntax-propertize, syntax-ppss): Use new `depth` arg to make sure noone accidentally gets added after syntax-ppss-flush-cache. * doc/lispref/modes.texi (Setting Hooks): Document new `depth` arg. * test/lisp/subr-tests.el (subr-tests-add-hook-depth): New test.
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