Unnecessary parentheses.
diff --git a/commons-geometry-euclidean/src/main/java/org/apache/commons/geometry/euclidean/threed/rotation/QuaternionRotation.java b/commons-geometry-euclidean/src/main/java/org/apache/commons/geometry/euclidean/threed/rotation/QuaternionRotation.java
index 216aaa7..460852e 100644
--- a/commons-geometry-euclidean/src/main/java/org/apache/commons/geometry/euclidean/threed/rotation/QuaternionRotation.java
+++ b/commons-geometry-euclidean/src/main/java/org/apache/commons/geometry/euclidean/threed/rotation/QuaternionRotation.java
@@ -83,9 +83,9 @@
     @Override
     public Vector3D getAxis() {
         final Vector3D axis = Vectors.tryNormalize(Vector3D.of(quat.getX(), quat.getY(), quat.getZ()));
-        return (axis != null) ?
-                axis :
-                Vector3D.Unit.PLUS_X;
+        return axis != null ?
+            axis :
+            Vector3D.Unit.PLUS_X;
     }
 
     /**