resolving 'Enumerable#reject issue. by upgrading
gems.
weird alignment issues resolved.
codesmell exercise: extract exact match to method
corrected var name.
codesmell exercise: extract number match to method
corrected var name for exact match.
move marking responsibilities into Marker class.
SRP for Marker class completed.
marker in seperate file.
name spacing Marker.
marker tests implemented and passing.
removing tests that are not the concern of the Game class.