to_tsvector() chopping off trailing 's' characters

From: Wells Oliver <wells(dot)oliver(at)gmail(dot)com>
To: pgsql-admin <pgsql-admin(at)postgresql(dot)org>
Subject: to_tsvector() chopping off trailing 's' characters
Date: 2019-11-01 18:28:17
Message-ID: CAOC+FBWAsQy7Gb57xqx8NVo3A5xq_zdrF6FuXXZ_AgmiSfMBeQ@mail.gmail.com
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I don't understand this behavior in 12 (worked in 9.6), but:

select 'Thames', to_tsvector('John Thames');

Gives you a vector of: 'john':1 'thame':2

And searching for the full 'Thames' returns no results.

What's happening here?

--
Wells Oliver
wells(dot)oliver(at)gmail(dot)com <wellsoliver(at)gmail(dot)com>

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