[gnome-text-editor] app: add [FILES...] to --help parameter string

[Christian Hergert <chergert src gnome org>]

commit 85f4c7032050371db040725ade7636c72243aca4
Author: Christian Hergert <chergert redhat com>
Date:   Wed Aug 10 13:06:28 2022 -0700

    app: add [FILES...] to --help parameter string

 src/editor-application.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/editor-application.c b/src/editor-application.c
index 823e78e..13ff6bf 100644
--- a/src/editor-application.c
+++ b/src/editor-application.c
@@ -551,6 +551,7 @@ editor_application_constructed (GObject *object)
 
   description = g_strdup_printf ("%s %s", _("Bugs may be reported at:"), PACKAGE_BUGREPORTS);
   g_application_set_option_context_description (G_APPLICATION (self), description);
+  g_application_set_option_context_parameter_string (G_APPLICATION (self), _("[FILES…]"));
 }
 
 static void