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layer at (0,0) size 800x600
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            LayoutTableCell {TD} at (0,0) size 72x23 [border: (1px solid #808080) none none (1px none #808080)] [r=0 c=0 rs=1 cs=1]
              LayoutText {#text} at (2,2) size 69x19
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                text run at (1,2) width 69: "Row1 cell2"
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        LayoutText {#text} at (0,0) size 713x19
          text run at (0,0) width 713: "The rules attribute is first set dynamically to cols, then to rows, so the table should show only row borders. Bug 14848."