xy specification of non-xy method

Author: tomvanmele

src/compas/geometry/_core/centroids.py

@@ -38,7 +38,7 @@
 
 
 def midpoint_point_point(a, b):
-    """Compute the midpoint of two points lying in the XY-plane.
+    """Compute the midpoint of two points.
 
     Parameters
     ----------