[gtk: 1/3] Fix small typo in the docs of GtkWidget

[Emmanuele Bassi <ebassi src gnome org>]

commit 293b81cad29ad7f18743b8788de1ad84a38e5c9d
Author: Ungedummt <ungedummt gmx de>
Date:   Sat Jan 30 21:56:03 2021 +0100

    Fix small typo in the docs of GtkWidget
    
    In a XML example was MyGrid as a class defined; replaced with GtkGrid

 gtk/gtkwidget.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 2904fa569a..f224c7a120 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -257,7 +257,7 @@
  * custom `<layout>` element, used to define layout properties:
  *
  * |[<!-- language="xml" -->
- * <object class="MyGrid" id="grid1">
+ * <object class="GtkGrid" id="my_grid">
  *   <child>
  *     <object class="GtkLabel" id="label1">
  *       <property name="label">Description</property>