runtests.pl: fix sprintf() using one too many %s

Closes #17740

diff --git a/tests/runtests.pl b/tests/runtests.pl
index d644a5e90834eb79c3ffcc40e619a6ce8a3b0e28..2708800318048f9e32cf4a831b95412ad1724cbc 100755 (executable)
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -879,7 +879,7 @@ sub checksystemfeatures {
         $feature{"TrackMemory"} = 0;
     }
 
-    logmsg sprintf("* Env: %s%s%s%s%s", $valgrind?"Valgrind ":"",
+    logmsg sprintf("* Env: %s%s%s%s", $valgrind?"Valgrind ":"",
                    $run_duphandle?"test-duphandle ":"",
                    $run_event_based?"event-based ":"",
                    $nghttpx_h3);