message: test/unit/linalg: fixed the typo
diff: @@ -27,7 +27,7 @@ void gradf1(const Vector &x, Vector &u)
  {
  u(0) = 2*x(0);
  if (x.Size() >= 2) { u(1) = 3*pow(x(1), 2); }
  - if (x.Size() >= 3) { u(2) = 4*pow(x(1), 3); }
  + if (x.Size() >= 3) { u(2) = 4*pow(x(2), 3); }
  }
  TEST_CASE("FormRectangular", "[FormRectangularSystemMatrix]")
  