[gtkmm: 5/10] Minor doc update for StringList

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 07409770adcbe960ca5ceef3da72c2b8b44a6177
Author: Andreas Persson <andreasp56 outlook com>
Date:   Wed Jul 29 08:27:43 2020 +0200

    Minor doc update for StringList

 gtk/src/stringlist.hg | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gtk/src/stringlist.hg b/gtk/src/stringlist.hg
index 1c9bf72f1..d01d39bf2 100644
--- a/gtk/src/stringlist.hg
+++ b/gtk/src/stringlist.hg
@@ -30,6 +30,9 @@ namespace Gtk
  *
  * The objects in the model have a "string" property.
  *
+ * GtkStringList is well-suited for any place where you would
+ * typically use a vector or array of Glib::ustring, but need a list model.
+ *
  * @par %Gtk::StringList as Gtk::Buildable
  * The %Gtk::StringList implementation of the Gtk::Buildable interface
  * supports adding items directly using the <items> element and