* lisp/doom-lib.el:
- (fn!): unroll the loop into a single, fast setplist that
doesn't require a cl-lib macro (autoloading which seems to throw an
error on flatpak/snap builds; still investigating that one).
- (add-transient-hook!): Removes a redundant let-bind. `sym` is
already lexically bound outside the function. This will break
anywhere lexical-binding is nil though. Not sure if I should cater
to that scenario...