Again with Immutabililty

So, a while ago I was telling all of my ardent readers that things can get kind of crazy when it comes to the question of using "real methods" for operator+= vs. using syntactic sugar.

Turns out I'm not the only person that's been troubled by this kind of a question; Scala programmers have to worry about it, as do the designers of Scala. Have a look at this post over on Stack Overflow.