Paraphrasing a question I previously asked on SuperUser because, IMO, the answer found there does not resolve the issue.
For the most part I prefer to disable Emacs' fringe. (I customize
no-fringes) But I like to have the left fringe active when debugging elisp code (for the little fringe arrow pointing to the active line).
How can I configure Emacs to switch to
(nil . 0) a/k/a
left-only when entering edebug and restore the previous
fringe-mode when exiting?
Since Emacs 24.3 is the latest stable release as of this writing, I have a preference for solutions that work there. Since Emacs 24.4 is available, in feature-freeze, and actively in use by several users of this site, I'm accepting that answer.