message: Removed spurious "aa" from flatc usage message.
diff: @@ -46,7 +46,7 @@ void FlatCompiler::Error(const std::string &err, bool usage,
  std::string FlatCompiler::GetUsageString(const char* program_name) const {
  std::stringstream ss;
  - ss << "Usageaa: " << program_name << " [OPTION]... FILE... [-- FILE...]\n";
  + ss << "Usage: " << program_name << " [OPTION]... FILE... [-- FILE...]\n";
  for (size_t i = 0; i < params_.num_generators; ++i) {
  const Generator& g = params_.generators[i];
  