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          text run at (0,0) width 137: "You should see a 100"
          text run at (137,0) width 167: "x100 green square below. "
          text run at (304,0) width 237: "If you see any red, the test has failed. "
          text run at (541,0) width 212: "This test is checking to make sure"
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          text run at (148,18) width 163: "a containing block model."
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