Refactored Tennis::Game3 class: Use absolute points_difference instead of multiplication
Refactored Tennis::Game3 class: Use absolute points_difference instead of multiplication

raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata,raihan2006i/Tennis-Refactoring-Kata