ok(lc($b) eq "hello\.\* world", 'lc');
# \x{100} is LATIN CAPITAL LETTER A WITH MACRON; its bijective lowercase is
-# \x{100}, LATIN SMALL LETTER A WITH MACRON.
+# \x{101}, LATIN SMALL LETTER A WITH MACRON.
$a = "\x{100}\x{101}\x{41}\x{61}";
$b = "\x{101}\x{100}\x{61}\x{41}";
# \x{149} is LATIN SMALL LETTER N PRECEDED BY APOSTROPHE, its uppercase is
# \x{2BC}\x{E4} or MODIFIER LETTER APOSTROPHE and N.
-ok("\U\x{DF}ab\x{149}cd" eq "\x{53}\x{53}AB\x{2BC}\x{4E}CD",
+ok("\U\x{DF}ab\x{149}cd" eq "SSAB\x{2BC}NCD",
"multicharacter uppercase");
# The \x{DF} is its own lowercase, ditto for \x{149}.