* lisp/emacs-lisp/bytecomp.el (byte-compile-force-lexical-warnings): New var.
(byte-compile-preprocess): Use it. (byte-compile-file-form-defalias): Try a bit harder to use macros we can't quite recognize. (byte-compile-add-to-list): Remove. * lisp/emacs-lisp/cconv.el (cconv-warnings-only): New function. (cconv-closure-convert): Add assertion. * lisp/emacs-lisp/map-ynp.el: Use lexical-binding. (map-y-or-n-p): Remove unused vars `tail' and `object'. Factor out some repeated code. * etc/NEWS (utf-8 for el): Move to the incompatible section.
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