Doc: B-Tree only has one additional parameter.
Oversight in commit
Backpatch: 13-, just like commit
@@ -425,7 +425,7 @@ CREATE [ UNIQUE ] INDEX [ CONCURRENTLY ] [ [ IF NOT EXISTS ] <replaceable class=
</variablelist>
<para>
- B-tree indexes also accept these parameters:
+ B-tree indexes additionally accept this parameter:
</para>
<variablelist>
