[RFC] Changes to 'selftest --starting-with'

[Harald Meland]

[Vincent Ladeuil]

> Thanks to your inputs, I realized that there is no real need for
> a leading special char. s.split('.') (s being the -s argument) is
> the prefix, either it's 'bzrlib' and it's left untouched or it
> appears in a prefix registry and is replaced or it's something
> else and it's an error (I recently mistyped 'bzlib.' in fact).
>
> Does that suit you ?

Yeah, that looks good.
-- 
Harald