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layer at (0,0) size 800x600
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        LayoutTableSection {TBODY} at (0,0) size 153x63
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            LayoutTableCell {TD} at (0,0) size 77x21 [border: (1px solid #808080) none none (1px none #808080)] [r=0 c=0 rs=1 cs=1]
              LayoutText {#text} at (2,2) size 74x17
                text run at (2,2) width 74: "Row1 cell1"
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              LayoutText {#text} at (1,2) size 74x17
                text run at (1,2) width 74: "Row1 cell2"
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            LayoutTableCell {TD} at (0,21) size 77x21 [border: (1px solid #808080) none none (1px none #808080)] [r=1 c=0 rs=1 cs=1]
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                text run at (1,2) width 74: "Row2 cell2"
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                text run at (2,2) width 74: "Row3 cell1"
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        LayoutText {#text} at (0,0) size 762x17
          text run at (0,0) width 762: "The rules attribute is first set dynamically to cols, then to rows, so the table should show only row borders. Bug 14848."