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          text run at (0,0) width 307: "You should see a 100x100 green square below. "
          text run at (307,0) width 242: "If you see any red, the test has failed. "
          text run at (549,0) width 215: "This test is checking to make sure"
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          text run at (145,19) width 161: "a containing block model."
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