> So if you use blank lines in any of your files, you are in blatant violation of AT&T's copyright claim Independent derivation of a work is defense against copyright infringement. Even if the copyright on these blank lines were to be valid, it would be reasonable to claim that your own use of blank lines was independent, not a derivative work copying from theirs. Patents do not require actual copying to infringe, bu…
In other words, if you use Ctrl+C, Ctrl+V to copy these blank lines, then you infringe AT&T copyright. If you don't and add blank lines by other means - you don't ;)