[gtkmm] MenuItem: Fix typo altough => although

[Daniel Boles <dboles src gnome org>]

commit 127adf0d02a53f05dac88edfedc53085d688acce
Author: Daniel Boles <dboles src gmail com>
Date:   Tue Oct 23 00:24:08 2018 +0100

    MenuItem: Fix typo altough => although

 gtk/src/menuitem.hg | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/src/menuitem.hg b/gtk/src/menuitem.hg
index 205ff378..0872c7f9 100644
--- a/gtk/src/menuitem.hg
+++ b/gtk/src/menuitem.hg
@@ -33,7 +33,7 @@ class Menu;
 
 /** Child item for menus.
  * Handle highlighting, alignment, events and submenus.
- * As it derives from Gtk::Bin it can hold any valid child widget, altough only a few are really useful.
+ * As it derives from Gtk::Bin it can hold any valid child widget, although only a few are really useful.
  * @ingroup Widgets
  * @ingroup Menus
  */