how is that copyleft? they aren't asking for any rights to be preserved. there is no mention of that at all, just a little 'i would like if...' not any requirem

how is that copyleft? they aren't asking for any rights to be preserved. there is no mention of that at all, just a little 'i would like if...' not any requirement to do so. if you state that you have released your rights into the public domain and use those words, it was very specific legal ramifications-- as in, you have released your work into the public domain.