fix doc/src/sgml/queries.sgml

On 5/25/15 10:47 PM, digoal zhou wrote:

doc/src/sgml/queries.sgml

1272 <programlisting>
1273 CUBE ( a, b, c )
1274 </programlisting>
1275 is equivalent to
1276 <programlisting>
1277 GROUPING SETS (
1278 ( a, b, c ),
1279 ( a, b ),
1280 ( a, c ),
1281 ( a ),
1282 ( b, c ),
1283 ( b ),
1284 ( c ),
1285 ( ),
1286 )

line 1285 fix to
1285 ( )

I have fixed this and a few similar issues nearby. Thanks.

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