fixed error message for assertEmpty
fixed error message for assertEmpty

Ignore-this: 47034be9d3e25be06b4c19ac0112db4d

darcs-hash:20100305213158-c96dc-bb9483a1ef08ef2df2039c90c097c0478646f2c0

skogsbaer/HTF,skogsbaer/HTF,ekarayel/HTF,ekarayel/HTF