message: Use lowerCamelCase for file level globals
diff: namespace {
  - const int STUDENT_TO_SCIENTIST_RATE = 35;
  -
  - const int STUDENT_TO_ADULT_BASE = 190;
  - const int ADULT_TO_RETIREE_BASE = 2000;
  + const int studentToScientistRate = 35;
  + const int studentToAdultBase = 190;
  + const int adultToRetireeBase = 2000;
  std::default_random_engine pop_generator;
  @@ -130,7 +129,7 @@ void Population::spawn_students()
  {
  mPopulationGrowth[PersonRole::ROLE_STUDENT] += mPopulation[PersonRole::ROLE_CHILD];
  - int divisor = std::max(adults(), STUDENT_TO_ADULT_BASE);
  + int divisor = std::max(adults(), studentToAdultBase);
  divisor = ((divisor / 40) * 3 + 16) * 4;
  int newStudents = mPopulationGrowth[PersonRole::ROLE_STUDENT] / divisor;
  @@ -149,14 +148,14 @@ void Population::spawn_adults(int universities)
  {
  mPopulationGrowth[PersonRole::ROLE_WORKER] += mPopulation[PersonRole::ROLE_STUDENT];
  - int divisor = std::max(adults(), STUDENT_TO_ADULT_BASE);
  + int divisor = std::max(adults(), studentToAdultBase);
  divisor = ((divisor / 40) * 3 + 45) * 4;
  int newAdult = mPopulationGrowth[PersonRole::ROLE_WORKER] / divisor;
  mPopulationGrowth[PersonRole::ROLE_WORKER] = mPopulationGrowth[PersonRole::ROLE_WORKER] % divisor;
  // account for universities
  - if (universities > 0 && random_0_100() <= STUDENT_TO_SCIENTIST_RATE)
  + if (universities > 0 && random_0_100() <= studentToScientistRate)
  {
  mPopulation[PersonRole::ROLE_SCIENTIST] += newAdult;
  }
  @@ -177,7 +176,7 @@ void Population::spawn_retiree()
  {
  mPopulationGrowth[PersonRole::ROLE_RETIRED] += total_adults / 10;
  - int divisor = std::max(total_adults, ADULT_TO_RETIREE_BASE);
  + int divisor = std::max(total_adults, adultToRetireeBase);
  divisor = ((divisor / 40) * 3 + 40) * 4;
  