ref: 1391a257e3efe1a9c3c431a0ba40533b75928b17 dir: /testdir/test12.ok/
first line Xtest1.swp under Xtest1.swp under under Xtest1.swp under Xtest1.swp Xtest3 under Xtest3 Xtest3.swp under Xtest3.swp