RubyMoney/money — pull request #303 by viettienn (2013-08-16 10:45:20+00:00)
Title: Allow us to change the money object itself by using exchange_to!

Currently:

money = Money.new 2000, "USD"
money = money.exchange_to "SGD"

This will help to shorten the code by just using:
money.exchange_to! "SGD"

Make sense to you guys?