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layer at (0,0) size 800x164
  RenderBlock {HTML} at (0,0) size 800x164
    RenderBody {BODY} at (8,8) size 784x148
      RenderBlock (anonymous) at (0,0) size 784x20
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          text run at (0,0) width 261: "You should see a green rectangle below. "
          text run at (260,0) width 239: "If you see any red, the test has failed."
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        RenderBlock {DIV} at (0,0) size 320x128 [bgcolor=#008000]
        RenderText {#text} at (0,0) size 0x0
