Re: [perl #39930] [BUG] concat unicode+iso-8859-1 doesn't work w/o ICU

[NotFound]

Patch applied in r29301

I changed the test, because the unicode: prefixed string is utf8 by
default according the specs, and the current implementation seems to
agree, so the result in utf8 is the expectation both with or without
icu.

-- 
Salu2