Trac #32891: fix a failing hyperbolic model doctest.

One of the tests in sage.geometry.hyperbolic_space.hyperbolic_model
is testing the wrong property (or the right property of the wrong
model). In the Poincare Disk (PD) model, we should be testing that
the endpoints of a geodesic lie in the unit disk, rather than in
the upper half-plane.

src/sage/geometry/hyperbolic_space/hyperbolic_model.py

@@ -564,8 +564,9 @@ def random_geodesic(self, **kwargs):
         EXAMPLES::
 
             sage: h = HyperbolicPlane().PD().random_geodesic()
-            sage: bool((h.endpoints()[0].coordinates()).imag() >= 0)
+            sage: all( e.coordinates().abs() <= 1 for e in h.endpoints() )
             True
+
         """
         R = self.realization_of().a_realization()
         g_ends = [R.random_point(**kwargs) for k in range(2)]