treewide: avoid strftime %k for portability

The musl strftime(3) implementation on AlpineLinux 3.19.0
doesn't support `%k' and `%k' isn't in POSIX, either.  So we
fall back to using the `sprintf' perlop in the user-facing UI
since leading zeroes require needless overhead for my eyes and
brain to parse in the time.

1 files changed, 1 insertions, 1 deletions

diff --git a/xt/msgtime_cmp.t b/xt/msgtime_cmp.t
index a7ef5245..c63f785e 100644
--- a/xt/msgtime_cmp.t
+++ b/xt/msgtime_cmp.t
@@ -36,7 +36,7 @@ sub quiet_is_deeply ($$$$$) {
                         ($old->[0] != $cur->[0]) ||
                         ($old->[1] != $cur->[1]))) {
                 for ($cur, $old) {
-                        $_->[2] = strftime('%Y-%m-%d %k:%M:%S', gmtime($_->[0]))
+                        $_->[2] = strftime('%F %T', gmtime($_->[0]))
                 }
                 is_deeply($cur, $old, "$func $oid");
                 diag('got: ', explain($cur));