In Gnulib we distribute and use the license with just a link to <https://www.gnu.org/licenses/> [1]. I would just use that.

Many GNU projects use a rule that will fail 'make distcheck' when it sees an address in the sources [2].

[1] https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=bf31... [2] https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=086c...

Hmm, I wonder if there is a linter somewhere for copyright notice and license grant smells.

Made a note to add an fsf-address check to check-all-the-things.