[Seaside] Problem with WAScriptTag content escaping, when nested into a WAScriptTag

[Balázs Kósi]

> You're probably doing it wrong, ti should probably be something like:
>
> update: [ :r | r script alert: 1 ]

In the block r is not an SUFactory, but a WARenderCanvas, so r script
gives you a WAScriptTag.

Cheers, Balázs