RE: Removing line and column number settings from some buffers

[Drew Adams]

> No experience with ring.  How is it used and what do you do?  Suppose I
> want a keybinding to cycle auto-fill with three things.
> 
> 1. Auto-Fill Comments
> 2. Auto-Fill Entire Buffer
> 3. Disable Auto-Fill


https://lists.gnu.org/archive/html/help-gnu-emacs/2020-11/msg00392.html

And you do have experience with Emacs rings, even if you're not aware of it: 

`C-h v search-ring'
`C-h v regexp-search-ring'