bug#19107: 25.0.50; emacs-lisp-mode: help-echo in font-lock-extra-managed-props

[Drew Adams]

> I confirm this is apparently still true on ac9a931, but I don't see why
> it's a problem.  Could you elaborate a bit?  What exactly breaks?  What
> is your non-font-lock use of help-echo?

Marcin, are you actually asking whether `help-echo' can or
should be used without font-lock?  If so, the answer is YES.

Text properties (including `face' and even `font-lock-face',
BTW) have nothing, per se, to do with `font-lock-mode'.
Font-lock is only one user of text properties.  Users and
code can use any properties in any way.

And property `help-echo', in particular, is used far and
wide outside of any use font-lock might make of it.

(As for the bug, I have nothing particular to say.  And your
question about what breaks is reasonable.  But keep in mind
that anything (font-lock or anything else) that assumes or
acts like it owns property `help-echo' is acting irresponsibly
and is bound to lead to bugs.)