Oops! My mistake.

Load the version 20 (from SqueakSource) and it will work fine.

If you want to try in 3.8, just copy the implementation of
String>>withoutLeadingBlanks from 3.9.

Cheers,

-- Diego


> Interesting!
> 
> I am unable to load in 3.8 and 3.9. There are several messages not
> understood, such as #inlineDo:, #jsLiteral:inSmalltalk:,
> #inlineIfTrue:, etc. What do I miss?
> 
> Lukas