Log Message:
-----------
Improve description of implicit-text-casting compatibility issue.
A bunch of other desultory copy-editing, too.
Modified Files:
--------------
pgsql/doc/src/sgml:
release.sgml (r1.544 -> r1.545)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release.sgml?r1=1.544&r2=1.545)