[gtk/matthiasc/for-master] applicationwindow: Fix menu example

[Matthias Clasen <matthiasc src gnome org>]

commit f28780d1eb2957b32176b0131e81c4a6d4edc808
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 4 07:48:33 2020 -0400

    applicationwindow: Fix menu example
    
    The xml syntax was wrong.

 gtk/gtkapplicationwindow.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkapplicationwindow.c b/gtk/gtkapplicationwindow.c
index f8ab3d406a..ce25b6700a 100644
--- a/gtk/gtkapplicationwindow.c
+++ b/gtk/gtkapplicationwindow.c
@@ -87,8 +87,14 @@
  *     "<interface>"
  *     "  <menu id='menubar'>"
  *     "    <submenu label='_Edit'>"
- *     "      <item label='_Copy' action='win.copy'/>"
- *     "      <item label='_Paste' action='win.paste'/>"
+ *     "      <item>"
+ *     "        <attribute name='label' translatable='yes'>_Copy</attribute>"
+ *     "        <attribute name='action'>win.copy</attribute>"
+ *     "      </item>"
+ *     "      <item>"
+ *     "        <attribute name='label' translatable='yes'>_Paste</attribute>"
+ *     "        <attribute name='action'>win.paste</attribute>"
+ *     "      </item>"
  *     "    </submenu>"
  *     "  </menu>"
  *     "</interface>",