[cvs-nhc98] patch applied (hat): Turn list sugaring back on by default, but ensure that no ambiguous

[Malcolm Wallace]

Tue Jun 18 07:55:58 PDT 2002  malcolm
  * Turn list sugaring back on by default, but ensure that no ambiguous
  list sugaring is generated, by testing whether the ultimate tail
  of a list is Hidden, Unevaluated, or Interrupted.  A cutoff tail is
  represented with an additional `...' to remind the user that there
  are more elements of the list.

    M ./src/hattools/HatObserve.hs -1 +1
    M ./src/hattools/HatTrail.hs -1 +1
    M ./src/hattools/SExp.hs -3 +11