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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 243: "If you see any red, the test has failed. "
          text run at (545,0) width 218: "This test is checking to make sure"
          text run at (0,20) width 151: "overflow is done using "
          text run at (150,20) width 167: "a containing block model."
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