Following? etc methods should return false if passed nil

[weiserma]

Example

@bar = nil
@foo.following?(@bar) -> false

[nejdetkadir]

Example

@bar = nil
@foo.following?(@bar) -> false

Hey @weiserma, thanks for writing this up. It raises an error if passing nil argument.

[weiserma]

Is that the intended result? IMHO Boolean functions should return true or false.