Doom used to have its own cc-mode style, which was difficult to
customize without first undoing all its changes.
A doom entry has been added to c-style-alist, which represents
a marriage of various styles (mostly linux), plus some context-sensitive
indentation functions which I think are reasonable.
More importantly, it can be disabled by changing c-default-style.
Also, removed a few hacks that have been merged into v5.33+ of cc-mode.
25.1 users beware! You may not have these changes.
+ enable lexical-scope everywhere (lexical-binding = t): ~5-10% faster
startup; ~5-20% general boost
+ reduce consing, function calls & garbage collection by preferring
cl-loop & dolist over lambda closures (for mapc[ar], add-hook, and
various cl-lib filter/map/reduce functions) -- where possible
+ prefer functions with dedicated opcodes, like assq (see byte-defop's
in bytecomp.el for more)
+ prefer pcase & cond (faster) over cl-case
+ general refactor for code readability
+ ensure naming & style conventions are adhered to
+ appease byte-compiler by marking unused variables with underscore
+ defer minor mode activation to after-init, emacs-startup or
window-setup hooks; a customization opportunity for users + ensures
custom functionality won't interfere with startup.
