pgsql: <example> is a floating element, so it's use is inappropriate

Log Message:
-----------
<example> is a floating element, so it's use is inappropriate when the
surrounding text refers to the example inline.

Tags:
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REL9_0_STABLE

Modified Files:
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pgsql/doc/src/sgml:
datatype.sgml (r1.250.2.4 -> r1.250.2.5)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/datatype.sgml?r1=1.250.2.4&amp;r2=1.250.2.5)