message: Fix comment: operator[] -> flatIdx()
diff: @@ -1420,7 +1420,7 @@ TEST(core_array, check_multidimensional)
  for(int i = 0; i < v_int_flat.size(); i++)
  {
  - // For a multidim array, op[] is a "flat" index into the raw data
  + // For a multidim array, flatIdx(i) is a "flat" index into the raw data
  EXPECT_EQ(v_int.flatIdx(i), v_int_flat[i]);
  }
  