message: Minor stylistic improvements
diff: @@ -87,7 +87,7 @@ public:
  auto trim_left = [](const std::string& input, std::string pattern = " \t")
  {
  auto first = input.find_first_not_of(pattern);
  - if (first == string::npos)
  + if (first == std::string::npos)
  {
  return input;
  }
  @@ -111,12 +111,12 @@ public:
  getline(file, line);
  // The next line has to be "{":
  if (line != "{") {
  - throw std::runtime_error("LandmarkMapper error: Expected a \"{\" on the line following \"landmarkMappings\" statement.");
  + throw std::runtime_error("LandmarkMapper error: Expected a \"{\" on the line following the \"landmarkMappings\" statement.");
  }
  while (getline(file, line))
  {
  - if (line == "}") { // end of the file
  + if (line == "}") { // end of the landmarkMappings block
  break;
  }
  // on comment, continue:
  