Re: duplicate "median" entry in doc

>> When trying to build the documentation there is a minor warning:
>>    collateindex.pl: duplicated index entry found: MEDIAN
>
> See
> https://www.postgresql.org/message-id/29262.1483053514@sss.pgh.pa.us
>
> I've been waiting for some clarification on that before attempting
> to fix this.  In any case, your proposed patch would remove the main
> index entry, which doesn't seem like what we want.

Hmmm. I do not get it.

I confirm that "oldhtml" does not generate the "see also" in head, 
probably because the first termindex/primary is kept and overrides the 
second somehow, which is consistent with the warning.

However, after removing the duplicate, both "oldhtml" (openjade 1.3, 
issues with 1.4) and "html" (xsltproc) generate a correct "median" index 
with its "see also" subsection, in "bookindex.html":

   ...
   MD5, Password Authentication
   median, Aggregate Expressions
       (see also percentile)
   memory context
   ...

So this really seems ok to me... The only difference is that with the new 
chain the percentile is a link and there are parentheses, while with 
oldhtml it is just text.

Am I missing something?

-- 
Fabien.