[cvs-nhc98] patch applied (hat): Slightly improved hat-source.

[Malcolm Wallace]

Thu Sep  2 13:00:02 PDT 2004  olaf
  * Slightly improved hat-source.
  Shows a stack of equations highlighted in same colours as in program text.

    M ./src/hattools/HatExplore.hs -26 +43
    M ./src/hattools/SExp.hs +21