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layer at (0,0) size 800x76
  RenderBlock {HTML} at (0,0) size 800x76
    RenderBody {BODY} at (8,8) size 784x52
      RenderBlock {DIV} at (0,0) size 784x18
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          text run at (0,0) width 154: "This should be unstyled."
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          text run at (0,0) width 241: "This should have a green background."