Log Message:
-----------
Update why unified diff is _sometimes_ better.
Modified Files:
--------------
pgsql/doc:
FAQ_DEV (r1.102 -> r1.103)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/FAQ_DEV.diff?r1=1.102&r2=1.103)
pgsql/doc/src/FAQ:
FAQ_DEV.html (r1.105 -> r1.106)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/FAQ_DEV.html.diff?r1=1.105&r2=1.106)