Fix whitespaces
Fix whitespaces

adam8157/gpdb,PengJi/gporca-comments,greenplum-db/gpdb,greenplum-db/gpdb,lisakowen/gpdb,adam8157/gpdb,greenplum-db/gpdb,xinzweb/gpdb,greenplum-db/gpdb,PengJi/gporca-comments,lisakowen/gpdb,lisakowen/gpdb,greenplum-db/gporca,lisakowen/gpdb,greenplum-db/gporca,jmcatamney/gpdb,greenplum-db/gporca,50wu/gpdb,adam8157/gpdb,greenplum-db/gpdb,adam8157/gpdb,greenplum-db/gpdb,50wu/gpdb,adam8157/gpdb,xinzweb/gpdb,lisakowen/gpdb,PengJi/gporca-comments,adam8157/gpdb,jmcatamney/gpdb,xinzweb/gpdb,greenplum-db/gporca,50wu/gpdb,xinzweb/gpdb,50wu/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,lisakowen/gpdb,adam8157/gpdb,lisakowen/gpdb,xinzweb/gpdb,50wu/gpdb,adam8157/gpdb,jmcatamney/gpdb,xinzweb/gpdb,lisakowen/gpdb,PengJi/gporca-comments,jmcatamney/gpdb,jmcatamney/gpdb,50wu/gpdb,xinzweb/gpdb,50wu/gpdb,PengJi/gporca-comments,50wu/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,xinzweb/gpdb