atan2 documentation bugs for 7.3 and 7.2

OK, patch applied.

---------------------------------------------------------------------------

Bruno Wolff III wrote:

In the section on mathematical functions the following is given for atan2:
atan2(x, y) inverse tangent of a/x

I believe the correct version should either be:
atan2(y, x) inverse tangent of y/x
or
atan2(x, y) inverse tangent of x/y

I beleive the documentation was also wrong for 7.2 where it was:
atan2(x, y) inverse tangent of y/x

The postgres functions seems to be the same as glibc function of the same
name when has the following man information:
double atan2(double y, double x);

DESCRIPTION
The atan2() function calculates the arc tangent of the two
variables x and y. It is similar to calculating the arc
tangent of y / x, except that the signs of both arguments
are used to determine the quadrant of the result.

---------------------------(end of broadcast)---------------------------
TIP 4: Don't 'kill -9' the postmaster

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073