Suggestion - Document a currently undocumented(?) feature - SELECT Table FROM Table

Hello, wonderful people who are providing us with a wonderful piece of
software!

Just wanted to suggest that an existing feature is included in the
documentation. It seems to be undocumented now. Also I don't think it's an
obvious feature. I looked carefully under the reference section for
SELECT, under the section talking about Composite Types, under the section
talking about ROW() and a bunch of other places but I couldn't find it.
This makes me hesitate to use it, because I don't know if and how much I
can rely on a feature that *seems* undocumented -- by the way, if it *is*
documented somewhere, I apologize in advance.

So, you can use the table name in the SELECT list to pack the columns of
the resultset into a composite datatype matching the table type. For
example, if I have a table called JOB_LOG, I can do this:

testdb=# Select JOB_LOG From JOB_LOG Limit 2;
job_log
--------------------------------------------------------------------------
(1,"2014-08-17 08:32:04.058247","dequeue: Retrieving next pending job",)
(2,"2014-08-17 08:32:04.108799","dequeue: No more jobs",)
(2 rows)

testdb=#

I hope you consider documenting this feature.
Thank you guys. Keep up the good work!