Fix assorted misstatements and poor wording in the descriptions of the I/O formats for geometric types.  Per bug #5536 from Jon Strait, and my own testing.
Fix assorted misstatements and poor wording in the descriptions of the I/O
formats for geometric types.  Per bug #5536 from Jon Strait, and my own
testing.

Back-patch to all supported branches, since this doco has been wrong right
along -- we certainly haven't changed the I/O behavior of these types in
many years.

edespino/gpdb,lintzc/gpdb,royc1/gpdb,greenplum-db/gpdb,adam8157/gpdb,janebeckman/gpdb,xuegang/gpdb,zaksoup/gpdb,Quikling/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,lintzc/gpdb,xinzweb/gpdb,chrishajas/gpdb,xuegang/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,50wu/gpdb,xuegang/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,lisakowen/gpdb,chrishajas/gpdb,cjcjameson/gpdb,Quikling/gpdb,cjcjameson/gpdb,edespino/gpdb,xinzweb/gpdb,rvs/gpdb,Quikling/gpdb,ashwinstar/gpdb,adam8157/gpdb,zaksoup/gpdb,lisakowen/gpdb,adam8157/gpdb,ahachete/gpdb,cjcjameson/gpdb,xinzweb/gpdb,ahachete/gpdb,jmcatamney/gpdb,xuegang/gpdb,Quikling/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,xinzweb/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,janebeckman/gpdb,Quikling/gpdb,adam8157/gpdb,lisakowen/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,0x0FFF/gpdb,xinzweb/gpdb,ahachete/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,royc1/gpdb,yuanzhao/gpdb,50wu/gpdb,royc1/gpdb,lintzc/gpdb,greenplum-db/gpdb,lintzc/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,edespino/gpdb,ahachete/gpdb,chrishajas/gpdb,chrishajas/gpdb,greenplum-db/gpdb,CraigHarris/gpdb,ashwinstar/gpdb,lintzc/gpdb,lisakowen/gpdb,CraigHarris/gpdb,lintzc/gpdb,chrishajas/gpdb,janebeckman/gpdb,Chibin/gpdb,edespino/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,0x0FFF/gpdb,jmcatamney/gpdb,ahachete/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,50wu/gpdb,50wu/gpdb,chrishajas/gpdb,janebeckman/gpdb,Chibin/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,0x0FFF/gpdb,Chibin/gpdb,Quikling/gpdb,jmcatamney/gpdb,janebeckman/gpdb,adam8157/gpdb,edespino/gpdb,yuanzhao/gpdb,ahachete/gpdb,ashwinstar/gpdb,Chibin/gpdb,janebeckman/gpdb,chrishajas/gpdb,royc1/gpdb,kaknikhil/gpdb,janebeckman/gpdb,zaksoup/gpdb,Chibin/gpdb,rvs/gpdb,ashwinstar/gpdb,0x0FFF/gpdb,royc1/gpdb,lisakowen/gpdb,kaknikhil/gpdb,0x0FFF/gpdb,xuegang/gpdb,cjcjameson/gpdb,zaksoup/gpdb,ahachete/gpdb,rvs/gpdb,rvs/gpdb,lintzc/gpdb,ashwinstar/gpdb,rvs/gpdb,0x0FFF/gpdb,jmcatamney/gpdb,janebeckman/gpdb,zaksoup/gpdb,edespino/gpdb,janebeckman/gpdb,xuegang/gpdb,lisakowen/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,adam8157/gpdb,lisakowen/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,adam8157/gpdb,xinzweb/gpdb,janebeckman/gpdb,Chibin/gpdb,CraigHarris/gpdb,rvs/gpdb,50wu/gpdb,royc1/gpdb,50wu/gpdb,Chibin/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,xinzweb/gpdb,royc1/gpdb,xuegang/gpdb,zaksoup/gpdb,CraigHarris/gpdb,royc1/gpdb,lisakowen/gpdb,yuanzhao/gpdb,rvs/gpdb,lintzc/gpdb,50wu/gpdb,zaksoup/gpdb,Chibin/gpdb,Quikling/gpdb,edespino/gpdb,Quikling/gpdb,xinzweb/gpdb,greenplum-db/gpdb,Quikling/gpdb,ahachete/gpdb,zaksoup/gpdb,xuegang/gpdb,rvs/gpdb,rvs/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,edespino/gpdb,Chibin/gpdb,chrishajas/gpdb,Quikling/gpdb,Chibin/gpdb,adam8157/gpdb,0x0FFF/gpdb,xuegang/gpdb,yuanzhao/gpdb,lintzc/gpdb,rvs/gpdb,CraigHarris/gpdb,edespino/gpdb,kaknikhil/gpdb,50wu/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,edespino/gpdb