[cvs-nhc98] patch applied (hat): Refactor the expression-squashing code into the paintOne routine,

[Malcolm Wallace]

Mon Jul  1 10:00:19 PDT 2002  malcolm
  * Refactor the expression-squashing code into the paintOne routine,
  so that the expression is pretty-printed only once at the final size,
  instead of twice.
  
  Also, make some fixes to the shrink/expand behaviour when an expression
  has been squashed.  Previously, this led to a garbled screen, and
  sometimes a disappearing selection.

    M ./src/hattools/HatTrail.hs -38 +44