bug#27111: mode-line-position is faulty after b0b02ca7

[Eli Zaretskii]

> Date: Mon, 29 May 2017 17:35:33 +0000
> Cc: Alex <agrambot@gmail.com>, 27111@debbugs.gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> > Not just "All" -- any location indication is no longer
> > mouse-sensitive.
> 
> > Alan, could you please take a look?
> 
> Yes, it's something causing text properties applied in the mode line
> with :propertize either not to be applied, to be discarded, or to be
> superseded by the mode line's default text properties.

If that's your problem, you should adhere religiously to the following
principle: make sure each string you put into some mode-line variable
has the same properties on all of its characters.

> By the way, did you see my proposed patch to CC Mode which would allow
> the user to switch between block comments and line comments?

Yes.  I'd like to hear more opinions about the issue raised by Stefan.