src/test/regress/expected/gp_xml.out

SELECT XMLPARSE(CONTENT '<abc>x</abc>'::text STRIP WHITESPACE) AS "xmlparse";
   xmlparse   
--------------
 <abc>x</abc>
(1 row)

SELECT XMLPARSE(CONTENT '<abc>x</abc>'::text PRESERVE WHITESPACE) AS "xmlparse";
   xmlparse   
--------------
 <abc>x</abc>
(1 row)