[Seaside-dev] Minor testing nitpick

[Michael Lucas-Smith]

In WAPlatformObjectTest>>testError, the testing protocol 
#should:raise:description: is used.
The *description: variants added to later SUnits were never added to 
SUnitToo because its author (Travis Griggs) hated them.
Are they widely used in the Seaside tests? if not, I'd recommend not 
using them for consistencies sake.

Cheers,
Michael