Fix for stop words in thesaurus file

Tom Lane wrote:
> Bruce Momjian <bruce(at)momjian(dot)us> writes:
> > Tom Lane wrote:
> >> One possible real solution would be to tweak the dictionary APIs so
> >> that the dictionaries can find out whether this is the first load during
> >> a session, or a reload, and emit notices only in the first case.
>
> > Yea, that would work too. Or just throw an error for a stop word in the
> > file and then you never get a reload (use "*" instead).
>
> Hm, that's a thought --- it'd be a way to solve the problem without an
> API change for dictionaries, which is something to avoid at this late
> stage of the 8.3 cycle. Come to think of it, does the ts_cache stuff
> work properly when an error is thrown in dictionary load (ie, is the
> cache entry left in a sane state)?

I have developed the attached patch which uses "?" to mark stop words in
the thesaurus file. ("*" was already in use in the file.) I updated
the docs to use "?", which makes the documentation clearer too.

The patch also reenables testing of stop words in the thesuarus file.

FYI, there is no longer a NOTICE for stop words in the thesaurus file;
it throws an error now, and says to use "?" instead.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://postgres.enterprisedb.com

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