Bergel, if you don't want Mac line endings,
http://minnow.cc.gatech.edu/squeak/565 explains a way to use the line
ending convention of your OS. 

  "Enable CrLfFileStream by editing the concreteStream method on the
  class side of FileStream; replace StandardFileStream by
  CrLfFileStream as follows:

  concreteStream
  ^CrLfFileStream"

-- 
Stan