Stefan Monnier wrote:

> Again, since this code is present at several places, move it into its
> own function.  Basically this function could turn the buffer value into
> a "cons of markers" value, so you can use it everywhere and reuse the
> code that handles a cons of markers.
>

Okay, sorry, I seem to have an irrational fear of introducing named
functions in elisp (possibly due to lack of CL packages I'm used to for
hiding). Attached.