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-rw-r--r--manual/examples/testopt.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/manual/examples/testopt.c b/manual/examples/testopt.c
index 0e0a84b470..ea2111540b 100644
--- a/manual/examples/testopt.c
+++ b/manual/examples/testopt.c
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /*@group*/