stop_columns (PDF::Writer)

          # File lib/pdf/writer.rb, line 1946
    1946:   def stop_columns
    1947:     return false unless @columns_on
    1948:     @columns_on = false
    1949:
    1950:     @columns[:bot_y] = @y if @y < @columns[:bot_y]
    1951:
    1952:     if (@columns[:bot_y] > @bottom_margin) or @column_number == 1
    1953:       @y = @columns[:bot_y]
    1954:     else
    1955:       start_new_page
    1956:     end
    1957:     restore_margins_after_columns
    1958:     @columns = {}
    1959:     true
    1960:   end