c += 'a' - 'A'
			}
			b[i] = c
		}
		return b
	}
	return Map(unicode.ToLower, s)
}

// ToTitle treats s as UTF-8-encoded bytes and returns a copy with all the Unicode letters mapped to their title case.
func ToTitle(s []byte) []byte { return Map(unicode.ToTitle, s) }

// ToUpperSpecial treats s as UTF-8-encoded bytes and returns a copy with all the Unicode letters mapped to their

	{"123a456", "123A456"},
	{"double-blind", "DOUBLE-BLIND"},
	{"ÿøû", "ŸØÛ"},
}

func TestToTitle(t *testing.T) {
	for _, tt := range ToTitleTests {
		if s := string(ToTitle([]byte(tt.in))); s != tt.out {
			t.Errorf("ToTitle(%q) = %q, want %q", tt.in, s, tt.out)
		}
	}
}

var EqualFoldTests = []struct {
	s, t string
	out  bool
}{
	{"abc", "abc", true},
	{"ABcd", "ABcd", true},