context.walk: walk all files when file and '.' given When both '.' (the working copy root) and an explicit file (or files) are in match.files(), we only walk the explicitly listed files. This is because we remove the '.' from the set too early. Move later and add a test for it. Before this change, the last test would print only "3".

ERROR: FIXME: This is a known failure of filelog.size for data starting with \1\n
OK.