message: C++11 fix: constexpr lamdbas not supported until C++17
diff: @@ -280,7 +280,7 @@ TEST_F(Sparse3x3MatrixAlignmentTest, IgnoreCommentLine) {
  partition_.Children()[1].Value().SetIndentationSpaces(1);
  // Pretend lines that begin with "three" are to be ignored, like comments.
  - constexpr auto ignore_threes = [](const TokenPartitionTree& partition) {
  + auto ignore_threes = [](const TokenPartitionTree& partition) {
  return partition.Value().TokensRange().front().Text() == "three";
  };
  