It looks like I did a s/a/__a/ substition in one of these headers, and
then copied it to the other one.
libstdc++-v3/ChangeLog:
* include/std/concepts: Fix typos in copyright notice.
* include/std/ranges: Likewise.
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
-// You should have received __a copy of the GNU General Public License and
-// __a copy of the GCC Runtime Library Exception along with this program;
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
-// You should have received __a copy of the GNU General Public License and
-// __a copy of the GCC Runtime Library Exception along with this program;
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.