bug#5809: 23.1.94; cross-reference by anchor yields in accurate position

[Stefan Monnier]

> Here's another, perhaps better idea: how about if, instead of
> inserting breadcrumbs as text into the buffer, we put an overlay there
> with a display property whose value is the breadcrumbs as a string?
> This way, buffer positions are not affected at all.

That was my thought as well, but then you can't "click" on breadcrumbs
with the keyboard any more.


        Stefan