exist, configure, doc2tex and \index

[Petr M. <mi...@ph...>]

Few minor things:

1. In ./configure, shouldn't strings "(EXPERIMENTAL)" be removed now? Won't 
be "nice" for 4.2.

2. Gnuplot supports both exists('a') and exist('a'), but documents only one 
of them. As it was me who made this confusion, I would propose to keep only 
exist('a').

3. doc2tex.c produces the following in the .tex file:

(see {\bf start-up (p.~\pageref{start-up})\index{up}}) and, of course,
 	by later explicit changes.
see {\bf mouse variables (p.~\pageref{mouse variables})\index{variables}}
 	for details.
See {\bf fit error\_estimates (p.~\pageref{fit error_estimates})\index{estimates}}.

as you see, there appears "up" keyword in the index, and similar. See the 
code in doc2tex.c, below line:
 	/* Make the final word an index entry also */
I propose to keep the whole word including "-" and "_".
Any idea?

---
PM