def _set_file_encoding_utf8(filename):
with open(filename, '<STR_LIT>') as f:<EOL><INDENT>content = f.read()<EOL>f.seek(<NUM_LIT:0>, <NUM_LIT:0>)<EOL>f.write("<STR_LIT>" + content)<EOL><DEDENT>
set a encoding header as suggested in PEP-0263. This
    is not entirely correct because we don't know the encoding of the
    given file but it's at least a chance to get metadata from the setup.py