def feed_position_only(self, token):
        ttype, tvalue, tstart, tend, tline = token
        self.feed((ttype, '', tstart, tstart, tline))
        self.end = tend
update with any whitespace we might have missed, and advance position to after the
dataset/ETHPy150Open dropbox/pyxl/pyxl/codec/parser.py/PyxlParser.feed_position_only