I use the web-beautify package. And, while I'm tangling my org-mode files to html, css and js files, every time I tangle these, error pop-up messages come in a new buffer. That annoys me a great deal. How do I disable those?
(Note: the message come in a *Web Beautify Errors* buffer.)
 
                        
I think that all you can sensibly do is suppress this buffer when Emacs tries to display it, because displaying it is hard-coded in
web-beautify-format-regionwhich sets theDISPLAY-ERROR-BUFFERargument when it callsshell-command-on-region.I think this will do the trick: