encoding: fix toutf8b() to resurrect lossy characters even if "\xed" in it If 's' is a localstr, 's._utf8' must be returned to get the original UTF-8 sequence back. Because of this, it was totally wrong to test if '"\xed" not in s', which should be either '"\xed" not in s._utf8' or just omitted. This patch moves the localstr handling to top as the validity of 's._utf8' should be pre-checked by encoding.tolocal().