requests/models.py
<<<<<<< SEARCH
        if body:
            length = super_len(body)

        self.body = body
        self.headers['Content-Length'] = str(length or 0)
=======
        if body:
            length = super_len(body)

        self.body = body

        if length:
            self.headers['Content-Length'] = str(length)
        elif self.method not in ('GET', 'HEAD'):
            self.headers['Content-Length'] = '0'
>>>>>>> REPLACE