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    RenderBody {BODY} at (8,8) size 784x120
      RenderBlock (anonymous) at (0,0) size 784x20
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          text run at (0,0) width 304: "You should see a 100x100 green square below. "
          text run at (303,0) width 239: "If you see any red, the test has failed."
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    RenderBlock {DIV} at (100,100) size 100x100 [bgcolor=#FF0000]
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  RenderBlock (positioned) {DIV} at (150,100) size 100x100 [bgcolor=#008000]
