layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x268
  RenderBlock {HTML} at (0,0) size 800x268
    RenderBody {BODY} at (8,16) size 784x236
      RenderBlock {P} at (0,0) size 784x20
        RenderText {#text} at (0,0) size 285x19
          text run at (0,0) width 285: "This <hr width=\"25%\"> should be centered:"
      RenderBlock {HR} at (293,36) size 198x2 [border: (1px inset #000000)]
      RenderBlock {P} at (0,54) size 784x20
        RenderText {#text} at (0,0) size 204x19
          text run at (0,0) width 204: "This one should be left-aligned."
      RenderBlock {HR} at (0,90) size 198x2 [border: (1px inset #000000)]
      RenderBlock {P} at (0,108) size 784x20
        RenderText {#text} at (0,0) size 212x19
          text run at (0,0) width 212: "This one should be right-aligned."
      RenderBlock {HR} at (586,144) size 198x2 [border: (1px inset #000000)]
      RenderBlock {P} at (0,162) size 784x20
        RenderText {#text} at (0,0) size 184x19
          text run at (0,0) width 184: "This one should be centered."
      RenderBlock {HR} at (293,198) size 198x2 [border: (1px inset #000000)]
      RenderBlock {P} at (0,216) size 784x20
        RenderText {#text} at (0,0) size 55x19
          text run at (0,0) width 55: "(W3C: \x{201C}"
        RenderInline {A} at (0,0) size 202x19 [color=#0000EE]
          RenderText {#text} at (54,0) size 202x19
            text run at (54,0) width 202: "By default, the rule is centered."
        RenderText {#text} at (255,0) size 13x19
          text run at (255,0) width 13: "\x{201D})"