I seem to have run into another problem that is probably me not understanding some part of Emacs... I'm trying to get whitespace-cleanup-mode set up ( https://github.com/purcell/whitespace-cleanup-mode
). I've followed the instructions, and everything seems to have gone fine. I added a mode hook for text-mode and prog-mode, and that seems to be working (judging from the mode list).
However, I do not get a warning either in the minibuffer nor in the *Messages* buffer when I set this: (setq whitespace-action '(report-on-bogus))
I have determined that the value is being seen (it appears in multiple buffers, not just the one I set it in). I have made sure to open the buffer with a clean file, and to 'mess it up' (adding trailing whitespace, to be specific).
I'm at a loss as to what is wrong.