Comment #3 on issue 3391 by stephane.ducasse: BlockClosure>>assertWithDescription: sends #logFailure:
http://code.google.com/p/pharo/issues/detail?id=3391
The first thing I would do is
assertWithDescription: aStringOrABlock
self value ifFalse: [
|value|
value := aStringOrABlock value.
AssertionFailure signal: value]
because logFailure: in anycase write to Transcript
