Remove mention of wal_files in a SHOW example.
Remove mention of wal_files in a SHOW example.

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