message: Individualism: increase commerce for Village and Town to +2
diff: <ImprovementYields>
  <iYield>0</iYield>
  <iYield>0</iYield>
  - <iYield>1</iYield>
  + <iYield>2</iYield>
  </ImprovementYields>
  </ImprovementYieldChange>
  <ImprovementYieldChange>
  <ImprovementYields>
  <iYield>0</iYield>
  <iYield>0</iYield>
  - <iYield>1</iYield>
  + <iYield>2</iYield>
  </ImprovementYields>
  </ImprovementYieldChange>
  </ImprovementYieldChanges>
  