Improve MathUtils.atan2() precision. (#6692)
Improve MathUtils.atan2() precision. (#6692)

* Improve precision for MathUtils.atan2(); add atan(), atanUnchecked().

* Apply formatter

Co-authored-by: GitHub Action <34eb4c4ef005207e8b8f916b9f1fffacccd6945e@github.com>
cypherdare/libgdx,bladecoder/libgdx,libgdx/libgdx,Zomby2D/libgdx,tommyettinger/libgdx,libgdx/libgdx,cypherdare/libgdx,tommyettinger/libgdx,cypherdare/libgdx,libgdx/libgdx,libgdx/libgdx,NathanSweet/libgdx,Zomby2D/libgdx,tommyettinger/libgdx,stinsonga/libgdx,cypherdare/libgdx,libgdx/libgdx,NathanSweet/libgdx,tommyettinger/libgdx,stinsonga/libgdx,bladecoder/libgdx,stinsonga/libgdx,NathanSweet/libgdx,Zomby2D/libgdx,stinsonga/libgdx,tommyettinger/libgdx,bladecoder/libgdx,bladecoder/libgdx,NathanSweet/libgdx,bladecoder/libgdx,Zomby2D/libgdx,stinsonga/libgdx,NathanSweet/libgdx,cypherdare/libgdx,Zomby2D/libgdx