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

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