RE: https://fosstodon.org/@davep/116341198726756217

TIL: defconst and defvar do not set a value if the symbol is already bound to a value. Which makes sense, but would confuse an unsuspecting goober who might be REPLing their way around a buffer making changes.

#emacs #emacslisp

@jameshowell The exception to this is if you use `eval-defun` (C-M-x), in which case the value is re-computed!