[cvs-nhc98] patch applied (hat): Show values of type IO as Abstract " IO" .

[Malcolm Wallace]

Tue Apr 23 03:02:19 PDT 2002  olaf
  * Show values of type IO as Abstract "IO".
  
  Values of type IO used to be of the form `hidden applied to lambda'. Showing Abstract IO instead is clearer (value of an abstract type) and does not contain less information. It is still possible to ask for the parent of Abstract IO.

    M ./src/hatlib/Hat.hs -1 +4
    M ./src/hatlib/TPreludeBuiltinTypes.hs -1 +1