code: def cursor_back(self, count=None):
          
          # Handle the case when we've just drawn in the last column
          # and would wrap the line on the next :meth:`draw()` call.
          if self.cursor.x == self.columns:
              self.cursor.x -= 1
  
          self.cursor.x -= count or 1
          self.ensure_hbounds()
docs: Move cursor left the indicated # of columns. Cursor stops
          at left margin.
  
          :param int count: number of columns to skip.