Ever since updating to emacs 25.3 yesterday I find that I cannot open
some of my files in emacs. This is the case in point -

--8<---------------cut here---------------start------------->8---
 [[~/cron/boudiccas.crontab]] 
--8<---------------cut here---------------end--------------->8---

On Monday that link would open the file in emacs, today, it doesn't and
the only change is the new emacs version.

So how do I fix it or get round it please?

To avoid cross-posting I'm going to send this email separately to the
'help-gun-emacs' list.

Thanks
Sharon.
-- 
A taste of linux = http://www.sharons.org.uk
TGmeds = http://www.tgmeds.org.uk
DrugFacts = https://www.drugfacts.org.uk  
Debian 9.0, fluxbox 1.3.5-2, emacs 25.3.1, org-mode 9.1