Log Message:
-----------
Add a few more details in the source-code-formatting documentation.
This isn't exhaustive but it covers some of the more common layout
mistakes I've seen in submitted patches.
Modified Files:
--------------
pgsql/doc/src/sgml:
sources.sgml (r2.30 -> r2.31)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/sources.sgml?r1=2.30&r2=2.31)