message: Update examples/nine-pt-stencil-solver/nine-pt-stencil-solver.cpp
  Doesn't hurt to change this and technically is faster.
diff: @@ -133,7 +133,7 @@ void print_solution(int dp, const double *u)
  for (int j = 0; j < dp; ++j) {
  std::cout << u[i * dp + j] << ' ';
  }
  - std::cout << std::endl;
  + std::cout << '\n';
  }
  std::cout << std::endl;
  }
  