Enum Integer instance - don't use default methods for 'succ' and 'pred', as they go via Int.
Enum Integer instance - don't use default methods for 'succ' and 'pred',
as they go via Int.

FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs