allfiles = allfiles + find ('*.ly', d)
allfiles = filter (lambda x: not x.endswith ('snippet-map.ly') and not re.search ('lily-[0-9a-f]+', x), allfiles)
allfiles = allfiles + find ('*.ly', d)
allfiles = filter (lambda x: not x.endswith ('snippet-map.ly') and not re.search ('lily-[0-9a-f]+', x), allfiles)