Evaluating custom-set-faces! calls would add setter functions to
doom-load-theme-hook indefinitely, which could add up each time you M-x
doom/reload. Now it adds them to a subhook, which is reset whenever Doom
is reloaded.
custom--inhibit-theme-enable is non-nil by default in Emacs 27, which
inhibits uses of `custom-theme-set-faces` when modifying any theme other
than 'user.
If lexical-binding isn't enabled (with ';; -*- lexical-binding: t; -*-'
at the top of your private config), custom-set-theme! and
custom-theme-set-faces! throw this error. Since these macros are
commonly used in user configs, where I can't police lexical-binding,
I've refactored it to not rely on it.
