[Glass] Possible Bug: String>>#= treats nulls as a terminator

[monty via Glass]

Is this correct?

(String with: 12 asCharacter with: 0 asCharacter) =
    (String with: 12 asCharacter with: 0 asCharacter with: 32 asCharacter)

Other string methods, like #copyAfter:, don't treat null the same way.