ST_Azimuth calculating with point of geography type returns negative value

[Lake]

According to the doc description: The azimuth is angle is referenced from north, and is positive clockwise: North = 0; East = π/2; South = π; West = 3π/2. But when giving two points of geography type, it returns negative value. eg:
SELECT degrees(ST_Azimuth(ST_GeographyFromText('SRID=4326;POINT(77.46412 37.96999)'), ST_GeographyFromText('SRID=4326;POINT(77.46409 37.96999)'))) AS degA_B;

[Paul Ramsey <pramsey@…>]

In 4f1fecf/git:

Return positive azimuth values per the documentation.
Closes #4718

[robe]

Shouldn't we also fix this in 3.0 branch or is it more involved?

Not backporting because a change in behavior.

From irc Paul's comment

It changes behaviour is why I didn't.
Since the answer returned isnt' "wrong" per se, it's also not super urgent.
It's just returning -90 instead of 270