[pygtk] reference: pygtk-gtkbutton.xml: add image-spacing style property

[Dieter Verfaillie <dieterv src gnome org>]

commit aa352f75e82a3c0a885a231788884c75007923c6
Author: Dieter Verfaillie <dieterv optionexplicit be>
Date:   Sat Feb 19 16:18:07 2011 +0100

    reference: pygtk-gtkbutton.xml: add image-spacing style property

 docs/reference/pygtk-gtkbutton.xml |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/pygtk-gtkbutton.xml b/docs/reference/pygtk-gtkbutton.xml
index 5584819..59e2878 100644
--- a/docs/reference/pygtk-gtkbutton.xml
+++ b/docs/reference/pygtk-gtkbutton.xml
@@ -300,6 +300,12 @@ when the button is depressed. Default value: 0</entry>
 	</row>
 
 	<row valign="top">
+	  <entry>"image-spacing"</entry>
+	  <entry>Read</entry>
+	  <entry>Spacing in pixels between the image and the label. Allowed values: &#62;=0. Default value: 2.</entry>
+	</row>
+
+	<row valign="top">
 	  <entry>"inner-border"</entry>
 	  <entry>Read</entry>
 	  <entry>The border between the button edges and child as a <link