Example indenting

I noticed that while the development docs indent examples (for example
http://developer.postgresql.org/pgdocs/postgres/sql-explain.html), the
main docs don't
(http://www.postgresql.org/docs/9.0/static/sql-explain.html).

As you can see, the same page on the main docs doesn't scan well, and
all the examples and paragraphs merge into a tangled mess.

Could someone update the main docs so it outputs a similar style to
the dev docs? This will probably require changes to the actual docs
to separate examples from other sections which share the same markup.

Thanks
--
Thom Brown
Registered Linux user: #516935