Correct some errors in plpgsql examples, as reported by Junichi Kobayasi.
Correct some errors in plpgsql examples, as reported by Junichi Kobayasi.

lisakowen/gpdb,lpetrov-pivotal/gpdb,0x0FFF/gpdb,randomtask1155/gpdb,atris/gpdb,rvs/gpdb,foyzur/gpdb,xinzweb/gpdb,lintzc/gpdb,pavanvd/postgres-xl,pavanvd/postgres-xl,foyzur/gpdb,ovr/postgres-xl,cjcjameson/gpdb,0x0FFF/gpdb,chrishajas/gpdb,ashwinstar/gpdb,50wu/gpdb,ashwinstar/gpdb,postmind-net/postgres-xl,ahachete/gpdb,adam8157/gpdb,snaga/postgres-xl,xuegang/gpdb,lisakowen/gpdb,edespino/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,ovr/postgres-xl,edespino/gpdb,Chibin/gpdb,edespino/gpdb,rvs/gpdb,50wu/gpdb,janebeckman/gpdb,janebeckman/gpdb,foyzur/gpdb,greenplum-db/gpdb,rvs/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,kaknikhil/gpdb,tangp3/gpdb,royc1/gpdb,techdragon/Postgres-XL,rubikloud/gpdb,50wu/gpdb,foyzur/gpdb,xuegang/gpdb,Postgres-XL/Postgres-XL,jmcatamney/gpdb,lintzc/gpdb,yuanzhao/gpdb,randomtask1155/gpdb,postmind-net/postgres-xl,Quikling/gpdb,atris/gpdb,50wu/gpdb,xuegang/gpdb,oberstet/postgres-xl,randomtask1155/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,yazun/postgres-xl,cjcjameson/gpdb,greenplum-db/gpdb,tangp3/gpdb,rubikloud/gpdb,zeroae/postgres-xl,kaknikhil/gpdb,xinzweb/gpdb,janebeckman/gpdb,oberstet/postgres-xl,yazun/postgres-xl,lintzc/gpdb,CraigHarris/gpdb,adam8157/gpdb,rvs/gpdb,chrishajas/gpdb,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,Chibin/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,ashwinstar/gpdb,janebeckman/gpdb,lintzc/gpdb,chrishajas/gpdb,Chibin/gpdb,yuanzhao/gpdb,50wu/gpdb,chrishajas/gpdb,pavanvd/postgres-xl,ovr/postgres-xl,zaksoup/gpdb,cjcjameson/gpdb,techdragon/Postgres-XL,Quikling/gpdb,tpostgres-projects/tPostgres,postmind-net/postgres-xl,Chibin/gpdb,adam8157/gpdb,xinzweb/gpdb,xinzweb/gpdb,lintzc/gpdb,50wu/gpdb,rvs/gpdb,adam8157/gpdb,kaknikhil/gpdb,janebeckman/gpdb,jmcatamney/gpdb,xuegang/gpdb,lpetrov-pivotal/gpdb,tpostgres-projects/tPostgres,zaksoup/gpdb,arcivanov/postgres-xl,rvs/gpdb,atris/gpdb,arcivanov/postgres-xl,rvs/gpdb,Quikling/gpdb,kmjungersen/PostgresXL,edespino/gpdb,Chibin/gpdb,kmjungersen/PostgresXL,xinzweb/gpdb,snaga/postgres-xl,greenplum-db/gpdb,edespino/gpdb,xinzweb/gpdb,CraigHarris/gpdb,xuegang/gpdb,rubikloud/gpdb,foyzur/gpdb,greenplum-db/gpdb,zaksoup/gpdb,janebeckman/gpdb,CraigHarris/gpdb,ashwinstar/gpdb,janebeckman/gpdb,kmjungersen/PostgresXL,greenplum-db/gpdb,cjcjameson/gpdb,randomtask1155/gpdb,xuegang/gpdb,adam8157/gpdb,oberstet/postgres-xl,Postgres-XL/Postgres-XL,Quikling/gpdb,lpetrov-pivotal/gpdb,ovr/postgres-xl,cjcjameson/gpdb,CraigHarris/gpdb,yazun/postgres-xl,atris/gpdb,lisakowen/gpdb,kaknikhil/gpdb,yazun/postgres-xl,jmcatamney/gpdb,0x0FFF/gpdb,chrishajas/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,chrishajas/gpdb,royc1/gpdb,arcivanov/postgres-xl,janebeckman/gpdb,Quikling/gpdb,oberstet/postgres-xl,ashwinstar/gpdb,lpetrov-pivotal/gpdb,snaga/postgres-xl,CraigHarris/gpdb,greenplum-db/gpdb,rubikloud/gpdb,ahachete/gpdb,lisakowen/gpdb,lpetrov-pivotal/gpdb,royc1/gpdb,Quikling/gpdb,atris/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,lintzc/gpdb,snaga/postgres-xl,lisakowen/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,yazun/postgres-xl,lintzc/gpdb,atris/gpdb,pavanvd/postgres-xl,kmjungersen/PostgresXL,ahachete/gpdb,0x0FFF/gpdb,tangp3/gpdb,xinzweb/gpdb,Chibin/gpdb,ashwinstar/gpdb,adam8157/gpdb,xinzweb/gpdb,Postgres-XL/Postgres-XL,pavanvd/postgres-xl,edespino/gpdb,royc1/gpdb,lpetrov-pivotal/gpdb,Chibin/gpdb,jmcatamney/gpdb,lintzc/gpdb,royc1/gpdb,0x0FFF/gpdb,ashwinstar/gpdb,royc1/gpdb,yuanzhao/gpdb,ahachete/gpdb,janebeckman/gpdb,rubikloud/gpdb,lisakowen/gpdb,rubikloud/gpdb,Postgres-XL/Postgres-XL,kaknikhil/gpdb,tangp3/gpdb,rvs/gpdb,0x0FFF/gpdb,CraigHarris/gpdb,royc1/gpdb,tangp3/gpdb,tangp3/gpdb,edespino/gpdb,cjcjameson/gpdb,edespino/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,ahachete/gpdb,tangp3/gpdb,Chibin/gpdb,greenplum-db/gpdb,adam8157/gpdb,snaga/postgres-xl,kmjungersen/PostgresXL,lpetrov-pivotal/gpdb,arcivanov/postgres-xl,ashwinstar/gpdb,zaksoup/gpdb,Quikling/gpdb,rubikloud/gpdb,ahachete/gpdb,postmind-net/postgres-xl,zaksoup/gpdb,yuanzhao/gpdb,atris/gpdb,lintzc/gpdb,foyzur/gpdb,randomtask1155/gpdb,Chibin/gpdb,xuegang/gpdb,tangp3/gpdb,cjcjameson/gpdb,xuegang/gpdb,Chibin/gpdb,zeroae/postgres-xl,zeroae/postgres-xl,techdragon/Postgres-XL,zaksoup/gpdb,Quikling/gpdb,arcivanov/postgres-xl,tpostgres-projects/tPostgres,techdragon/Postgres-XL,arcivanov/postgres-xl,0x0FFF/gpdb,zaksoup/gpdb,foyzur/gpdb,zeroae/postgres-xl,postmind-net/postgres-xl,ahachete/gpdb,royc1/gpdb,randomtask1155/gpdb,ovr/postgres-xl,jmcatamney/gpdb,edespino/gpdb,janebeckman/gpdb,lisakowen/gpdb,kaknikhil/gpdb,zaksoup/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,adam8157/gpdb,Quikling/gpdb,50wu/gpdb,tpostgres-projects/tPostgres,rvs/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,foyzur/gpdb,rubikloud/gpdb,zeroae/postgres-xl,lisakowen/gpdb,edespino/gpdb,ahachete/gpdb,tpostgres-projects/tPostgres,chrishajas/gpdb,chrishajas/gpdb,yuanzhao/gpdb,rvs/gpdb,50wu/gpdb,yuanzhao/gpdb,Quikling/gpdb,oberstet/postgres-xl,randomtask1155/gpdb,atris/gpdb