atan2 documentation bugs for 7.3 and 7.2

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.