* Fix two deprecated methods usages
* Test ToNumber conversions
* Test behavior of all functions when passed 0 or 8 arguments
There are 16 which fail currently on 0 args (return null or
False instead of EvalError), but have been whitelisted until
we can verify whether it's safe to change them without introducing
compatibility issues.
There are 19 which fail to return an error on too many (ie 8) args.
