test,lsudev: add attribute format to println()

  ../test/lsudev.c: In function ‘println’:
  ../test/lsudev.c:68:5: warning: function ‘println’ might be a candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]
     68 |     g_string_append_vprintf (output, fmt, args);
        |     ^~~~~~~~~~~~~~~~~~~~~~~

1 files changed, 3 insertions, 4 deletions

diff --git a/test/lsudev.c b/test/lsudev.c
index 85c76f8c5..fb53c1e15 100644
--- a/test/lsudev.c
+++ b/test/lsudev.c
@@ -50,6 +50,8 @@ setup_signals (void)
     sigaction (SIGINT,  &action, NULL);
 }
 
+static void println (guint indent, const char *fmt, ...) __attribute__((__format__ (__printf__, 2, 3)));
+
 static void
 println (guint indent, const char *fmt, ...)
 {
@@ -90,8 +92,7 @@ dump_device_and_parent (GUdevDevice *device, guint indent)
     println (indent, "Action:   %s", g_udev_device_get_action (device));
     println (indent, "Seq Num:  %lu", g_udev_device_get_seqnum (device));
     println (indent, "Dev File: %s", g_udev_device_get_device_file (device));
-
-    println (indent, "");
+	println (indent, "-----------");
     println (indent, "Properties:");
 
     /* Get longest property name length for alignment */
@@ -111,8 +112,6 @@ dump_device_and_parent (GUdevDevice *device, guint indent)
         println (indent + 2, "%s", propstr);
     }
 
-    println (indent, "");
-
     parent = g_udev_device_get_parent (device);
     if (parent) {
         dump_device_and_parent (parent, indent + 4);