bug#36526: Previous work on this subject

[Herring, Davis]

[Please CC me; I'm subscribed to devel, not bugs.  Also, hopefully DMARC 
doesn't mess anyone up here.]

I wrote a version of this feature before; at the time, the list wasn't 
convinced of the motivation, but there seems to be some more interest since.  
The patch still applies and works; I'd be glad to update it further for 
inclusion.

https://lists.gnu.org/archive/html/emacs-devel/2016-02/msg01066.html

Davis