bug#25071: 26.0.50; Various Forth related improvements for etags

[Eli Zaretskii]

> From: Helmut Eller <eller.helmut@gmail.com>
> Cc: 25071@debbugs.gnu.org
> Date: Wed, 30 Nov 2016 20:32:21 +0100
> 
> On Wed, Nov 30 2016, Eli Zaretskii wrote:
> 
> >> Yes, the TAGS file becomes at most twice as big.  That's a minor
> >> disadvantage that I'm happy to trade for even tiny improvements in
> >> precision.
> >
> > It clearly isn't a catastrophe, if doing that is necessary.  I just
> > want to be sure that all Forth tags need to be explicit.  Is there
> > perhaps some reasonably easy way to make only those tags explicit
> > which actually use the special characters that require it?
> 
> OK.  Here's an updated patch.  It calls make_tag instead of pfnote.
> make_tag tries to use implicit names if possible.  If it's not possible,
> it creates an explicit name.

Thanks, pushed to master.