On 25.07.2010, at 04:22, Rob Withers wrote:

> Thanks for pointing this out.  I am not happy about this at all.  It is very non-intuitive, all due to an optimization that limits my expressiveness.

If string literals were immutable you would have to copy them yourself, too. So in any case you need to write 

	plain := 'squeaker' copy

if you intend to modify that string in-place.

- Bert -