def _decode_unknown_from_base64(path, bcontent):
content = b64decode(bcontent)<EOL>try:<EOL><INDENT>return (content.decode('<STR_LIT:utf-8>'), '<STR_LIT:text>')<EOL><DEDENT>except UnicodeError:<EOL><INDENT>pass<EOL><DEDENT>return bcontent.decode('<STR_LIT:ascii>'), '<STR_LIT>'<EOL>
Decode base64 data of unknown format.

Attempts to interpret data as utf-8, falling back to ascii on failure.