I didn't know about TERM=dumb at all until last weekend when I was messing with Haskell. Without it, the line editor in the REPL was broken when moving through

I didn't know about TERM=dumb at all until last weekend when I was messing with Haskell. Without it, the line editor in the REPL was broken when moving through the history (in both Terminal.app and iTerm2). I was surprised that it worked though since I expected that TERM=dumb would result in the REPL not being able to use any ANSI escape codes.