Minor fixes related to test migration

include/J3ML/LinearAlgebra/Quaternion.h

@@ -41,7 +41,7 @@ namespace J3ML::LinearAlgebra
         Quaternion(const Vector3 &rotationAxis, float rotationAngleRadians);
         Quaternion(const Vector4 &rotationAxis, float rotationAngleRadians);
 
-        explicit Quaternion(Vector4 vector4);
+        explicit Quaternion(const Vector4& vector4);
         explicit Quaternion(const EulerAngle& angle);
         explicit Quaternion(const AxisAngle& angle);
 
@@ -220,6 +220,7 @@ namespace J3ML::LinearAlgebra
 
         // Transforms the given vector by this Quaternion.
         Vector3 operator * (const Vector3& rhs) const;
+
         Vector4 operator * (const Vector4& rhs) const;
 
         // Divides a quaternion by another. Divison "a / b" results in a quaternion that rotates the orientation b to coincide with orientation of