Some improvements in geometric-operators documentation.
Some improvements in geometric-operators documentation.

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