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          text run at (0,0) width 772: "The first and last lines of text in the regions below should be clipped to the green box. The overflow section sizes itself and"
          text run at (0,19) width 692: "clips differently in each region. The green box should be even with the lime floats at the top of the first region."
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        RenderRegion {DIV} at (0,152) size 402x152 [border: (1px solid #000000)]
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Flow Threads
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      RenderFlowThread at (0,0) size 400x450
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          RenderBlock {DIV} at (5,5) size 390x225 [border: (1px solid #0000FF)]
            RenderBlock (floating) {DIV} at (6,6) size 50x50 [bgcolor=#00FF00]
            RenderBlock (floating) {DIV} at (334,6) size 50x50 [bgcolor=#00FF00]
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            text run at (50,0) width 276: "These lines will not spill out of the regions."
            text run at (50,19) width 276: "These lines will not spill out of the regions."
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            text run at (276,30) width 100: "These lines will"
            text run at (0,49) width 376: "not spill out of the regions. These lines will not spill out of"
            text run at (0,68) width 73: "the regions."
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    RenderRegion {DIV} #region2
    RenderRegion {DIV} #region3