message: Use the right unsigned type for a loop through a vector.
diff: @@ -58,8 +58,8 @@ TEST(FormatEquivalentTest, Spaces) {
  "\n",
  "\t",
  };
  - for (int i = 0; i < kTestCases.size(); ++i) {
  - for (int j = i + 1; j < kTestCases.size(); ++j) {
  + for (size_t i = 0; i < kTestCases.size(); ++i) {
  + for (size_t j = i + 1; j < kTestCases.size(); ++j) {
  ExpectCompareWithErrstream(FormatEquivalent, true, kTestCases[i],
  kTestCases[j]);
  }
  