'Print trace output displaying that a token has been shifted.
:rtype: None'

def _trace_shift(self, stack, remaining_text):

    if (self._trace > 2):
        print((u'Shift    %r:' % stack[(-1)]))
    if (self._trace == 2):
        self._trace_stack(stack, remaining_text, u'S')
    elif (self._trace > 0):
        self._trace_stack(stack, remaining_text)
