Fix formatting and style issues in volume_of_torus

Author: Gopesh111

maths/volume_of_torus.py

@@ -1,5 +1,6 @@
 """
-Volume of a Torus
+Volume of a Torus.
+
 Reference: https://en.wikipedia.org/wiki/Torus
 """
 
@@ -21,15 +22,11 @@ def volume_of_torus(major_radius: float, minor_radius: float) -> float:
     59.21762640653615
     >>> volume_of_torus(5.0, 2.0)
     394.7841760435743
-    >>> volume_of_torus(0.0, 0.0)
-    0.0
     """
-    if major_radius < 0:
-        raise ValueError("major_radius must be non-negative")
-    if minor_radius < 0:
-        raise ValueError("minor_radius must be non-negative")
+    if major_radius < 0 or minor_radius < 0:
+        raise ValueError("Radii must be non-negative")
 
-    return 2 * (pi**2) * major_radius * (minor_radius**2)
+    return 2 * pi**2 * major_radius * minor_radius**2
 
 
 if __name__ == "__main__":