Document atan2() as y/x, rather than x/y, to conform to general usage.
Document atan2() as y/x, rather than x/y, to conform to general usage.

Andrew Maclean

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