What do you mean? It's in every file on top.

Oh, OK - I see it in the .el files.

I'd suggest having an explicit COPY or LICENSE file in the root directory for easy convenience. In principle, you could have a different license in each file, and it'd be the user's responsibility to check each file, which is a pain. If instead you explicitly say that the whole project is GPL v3 in one main file, it spares the user some headaches.

Also, it says ";; You should have received a copy of the GNU General Public License
;; along with Smartparens. If not, see http://www.gnu.org/licenses/." but I don't think you have it in the repository. Creating a COPY or LICENSE file with the full GPL in it would satisfy this.

Anyway, not trying to be a license nazi or anything. I just needed to know the license to ensure I could use it at work, and you've answered my query. Feel free to close the issue if you don't want to take further action.

BTW, another way to do it is just to use Github to apply a license:

Fair enough.