Minor improvements to the Gin internal documentation.
Minor improvements to the Gin internal documentation.

Chibin/gpdb,50wu/gpdb,yuanzhao/gpdb,adam8157/gpdb,snaga/postgres-xl,adam8157/gpdb,greenplum-db/gpdb,postmind-net/postgres-xl,techdragon/Postgres-XL,jmcatamney/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,lisakowen/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,xinzweb/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,lisakowen/gpdb,edespino/gpdb,Chibin/gpdb,edespino/gpdb,yazun/postgres-xl,Postgres-XL/Postgres-XL,ovr/postgres-xl,zeroae/postgres-xl,arcivanov/postgres-xl,tpostgres-projects/tPostgres,50wu/gpdb,50wu/gpdb,zeroae/postgres-xl,snaga/postgres-xl,lisakowen/gpdb,kmjungersen/PostgresXL,Postgres-XL/Postgres-XL,ovr/postgres-xl,kmjungersen/PostgresXL,postmind-net/postgres-xl,greenplum-db/gpdb,adam8157/gpdb,greenplum-db/gpdb,xinzweb/gpdb,greenplum-db/gpdb,yazun/postgres-xl,kmjungersen/PostgresXL,Chibin/gpdb,ovr/postgres-xl,yuanzhao/gpdb,zeroae/postgres-xl,edespino/gpdb,tpostgres-projects/tPostgres,xinzweb/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,pavanvd/postgres-xl,kmjungersen/PostgresXL,snaga/postgres-xl,edespino/gpdb,snaga/postgres-xl,Chibin/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,yazun/postgres-xl,yuanzhao/gpdb,ovr/postgres-xl,ashwinstar/gpdb,edespino/gpdb,lisakowen/gpdb,yazun/postgres-xl,tpostgres-projects/tPostgres,ashwinstar/gpdb,ashwinstar/gpdb,pavanvd/postgres-xl,jmcatamney/gpdb,techdragon/Postgres-XL,arcivanov/postgres-xl,techdragon/Postgres-XL,techdragon/Postgres-XL,arcivanov/postgres-xl,edespino/gpdb,Chibin/gpdb,Postgres-XL/Postgres-XL,edespino/gpdb,lisakowen/gpdb,edespino/gpdb,adam8157/gpdb,50wu/gpdb,50wu/gpdb,oberstet/postgres-xl,Chibin/gpdb,yuanzhao/gpdb,lisakowen/gpdb,adam8157/gpdb,xinzweb/gpdb,Chibin/gpdb,yuanzhao/gpdb,50wu/gpdb,ovr/postgres-xl,yuanzhao/gpdb,jmcatamney/gpdb,xinzweb/gpdb,postmind-net/postgres-xl,xinzweb/gpdb,adam8157/gpdb,oberstet/postgres-xl,ashwinstar/gpdb,postmind-net/postgres-xl,zeroae/postgres-xl,xinzweb/gpdb,Postgres-XL/Postgres-XL,jmcatamney/gpdb,tpostgres-projects/tPostgres,greenplum-db/gpdb,oberstet/postgres-xl,lisakowen/gpdb,Chibin/gpdb,adam8157/gpdb,50wu/gpdb,lisakowen/gpdb,50wu/gpdb,postmind-net/postgres-xl,oberstet/postgres-xl,arcivanov/postgres-xl,greenplum-db/gpdb,techdragon/Postgres-XL,adam8157/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,kmjungersen/PostgresXL,xinzweb/gpdb,ashwinstar/gpdb,edespino/gpdb,Chibin/gpdb,pavanvd/postgres-xl,pavanvd/postgres-xl,tpostgres-projects/tPostgres,arcivanov/postgres-xl,arcivanov/postgres-xl,snaga/postgres-xl,Postgres-XL/Postgres-XL,oberstet/postgres-xl,edespino/gpdb,yazun/postgres-xl,Chibin/gpdb