Convert explanation of interval change into something resembling grammatical English, and fix the incorrect example.
Convert explanation of interval change into something resembling grammatical
English, and fix the incorrect example.

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