Hi Tetsuo and happy 2020,
I have found and fixed quite a few mistakes in this commit. But I would like to ask you if you have time to recheck your changes in this commit manually to make sure that we haven't broken any more headers. In general we shouldn't alter third-party license headers.
Then the other question is if we really want to change the license headers of all files every year or only the license headers of the files that have been modified during the past year. This would also exclude many of the mistakes on third pary files that we never touch.
Best regards
Kostas