I am using SLIME (which includes hyperspec.el). I wanted to view the HyperSpec using Emacs' EWW instead of the desktop web browser (e.g. Firefox, Chromium, etc.). To do this, I added an advice to set the web browser to EWW for looking at the HyperSpec:
(advice-add 'hyperspec-lookup :around (lambda (orig-fun &rest args) (let ((browse-url-browser-function 'eww-browse-url)) (apply orig-fun args))))
However, I always get the following message in the
*Messages* buffer the first time I use
hyperspec-lookup after starting Emacs.
Making browse-url-browser-function local to *eww* while let-bound!
Is this an error message? What does it mean? How do I fix it?