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        text run at (0,0) width 759: "This tests to see that a caret is placed inside an editable document that is entirely editable even when no caret is requested"
        text run at (0,18) width 118: "programmatically. "
        text run at (118,18) width 187: "We do this as a convenience. "
        text run at (305,18) width 479: "Right now, we only do this convenience when a document's frame becomes"
        text run at (0,36) width 378: "first responder or when a document's window becomes key."
