CL-DIFFLIB is copyright John Wiseman and is covered by the MIT license.
See this lemonodor post for more information.
Download ASDF package from http://lemonodor.com/code/cl-difflib_0.1.tar.gz
You may also be interested in Nathan Froyd's diff package (though it seems to support only SBCL).
This page is linked from: CL-HTML-DIFF
CLiki pages can be edited by anyone at any time. Imagine a fearsomely comprehensive disclaimer of liability. Now fear, comprehensively