Fix up grammar in variable description string.
Fix up grammar in variable description string.

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