Nick Coghlan added the comment:
For the case where POSIX is a distinct locale from the default C locale (rather
than a simple alias), I'm leaning towards taking PEP 538 literally, and
adjusting the affected test cases to assume that locale coercion *won't* happen
for that case on Mac OS X.
I
New submission from Nick Coghlan:
To get the new PEP 538 tests passing on Mac OS X (see [1,2]), I ended up having
to skip the following test scenarios:
LANG=UTF-8 (behaves like LANG=C, *not* LC_CTYPE=UTF-8)
LANG=POSIX (behaves like a distinct locale is set, not LANG=C)
