message: Use idioms that don't require C++17 to keep C++11 compatibility.
diff: @@ -84,9 +84,11 @@ int LintOneFile(std::ostream* stream, absl::string_view filename,
  const LinterConfiguration& config, bool parse_fatal,
  bool lint_fatal) {
  std::string content;
  - if (auto status = verible::file::GetContents(filename, &content);
  - !status.ok()) {
  - LOG(ERROR) << "Can't read '" << filename << "': " << status.message();
  + const absl::Status content_status =
  + verible::file::GetContents(filename, &content);
  + if (!content_status.ok()) {
  + LOG(ERROR) << "Can't read '" << filename
  + << "': " << content_status.message();
  return 2;
  }
  