[gtk/ebassi/for-master: 1/2] docs: Fix the Widget as Buildable example

[Emmanuele Bassi <ebassi src gnome org>]

commit 2c97d4428101a9f1f74dd01a241e661d3ec3b0e9
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Dec 11 23:41:51 2020 +0000

    docs: Fix the Widget as Buildable example
    
    The layout properties use an old name.

 gtk/gtkwidget.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index a112309cdf..d2cd6db327 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -265,7 +265,7 @@
  *         <property name="column">0</property>
  *         <property name="row">0</property>
  *         <property name="row-span">1</property>
- *         <property name="col-span">1</property>
+ *         <property name="column-span">1</property>
  *       </layout>
  *     </object>
  *   </child>
@@ -275,7 +275,7 @@
  *         <property name="column">1</property>
  *         <property name="row">0</property>
  *         <property name="row-span">1</property>
- *         <property name="col-span">1</property>
+ *         <property name="column-span">1</property>
  *       </layout>
  *     </object>
  *   </child>