I was emailed recently by someone authoring testcases. Such files can often be just one or two lines long, and so having a 30-line tri-license block in them seems overkill. They asked if it were possible to simply put them in the public domain.
After consultation with lawyers, we’ve agreed that it’s fine for people writing testcases and other such fairly trivial code to use the following 2-line boilerplate (with appropriate comment characters):
Any copyright is dedicated to the Public Domain. http://creativecommons.org/licenses/publicdomain/
I hope that makes some people’s lives simpler :-)