[gnome-shell] extensions-tool: Add missing newline

[Marge Bot <marge-bot src gnome org>]

commit 79f448958b5ea16bc6a1f91117ed02a889712c90
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Oct 28 20:05:03 2021 +0200

    extensions-tool: Add missing newline
    
    Unlike g_warning() and friends, g_printerr() does not append
    a trailing newline.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4564
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2013>

 subprojects/extensions-tool/src/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/subprojects/extensions-tool/src/main.c b/subprojects/extensions-tool/src/main.c
index c33058dc67..c1e85dcf1f 100644
--- a/subprojects/extensions-tool/src/main.c
+++ b/subprojects/extensions-tool/src/main.c
@@ -143,7 +143,7 @@ get_extension_property (GDBusProxy *proxy,
                                      &error);
   if (response == NULL)
     {
-      g_printerr (_("Failed to connect to GNOME Shell"));
+      g_printerr (_("Failed to connect to GNOME Shell\n"));
       return NULL;
     }