/usr/share/go-1.6/test/fixedbugs/issue11053.out is in golang-1.6-src 1.6.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3
Starting Before, *resp.V= 42 After, *resp.V= 42