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layer at (0,0) size 800x52
  RenderBlock {HTML} at (0,0) size 800x52
    RenderBody {BODY} at (8,16) size 784x20
      RenderBlock {DIV} at (0,0) size 784x20
        RenderBlock {P} at (0,0) size 784x20 [bgcolor=#00FF00]
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            text run at (0,0) width 551: "This paragraph should have a green background and there should be no red anywhere."