bug#48107: 27.2; tags-quiery-replace fails to find occurences

[Gregory Heytings]

> > Thanks for your bug report.  I can indeed reproduce this with Emacs 
> > 27.2, but not with the development version of Emacs, so this bug has 
> > apparently already been fixed.  I did not find a workaround for Emacs 
> > 27.2 alas, even saving both buffers and manually re-running etags does 
> > not fix the bug.
>
> The workaround for Emacs 27 is to go to BOB in every file that was 
> visited by the original replace.

Indeed, that works, thanks.  For Bob Floyd: "go to BOB" is not a reference 
to your first name ;-), it means "go to the beginning of buffer", for 
example with M-<.