[gtksourceview/wip/font-scaling] Headings Style Documentation

[Sébastien Wilmet <swilmet src gnome org>]

commit 24e18e80280062e67a568e50c883d335093940c7
Author: Andreas Fuchs <anduchs gmail com>
Date:   Sat Jan 4 09:42:46 2014 +0100

    Headings Style Documentation

 docs/reference/style-reference.xml |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/style-reference.xml b/docs/reference/style-reference.xml
index c2bb183..13f83bc 100644
--- a/docs/reference/style-reference.xml
+++ b/docs/reference/style-reference.xml
@@ -149,6 +149,15 @@ Background color.
 <term><code>strikethrough</code></term>
 <listitem><para>"true" or "false"</para></listitem>
 </varlistentry>
+<varlistentry>
+<term><code>scale</code></term>
+<listitem><para>
+Scale the matched text block. Possible values are a float number as factor
+(e.g. <code>"1.75"</code>) or one of the values <code>"xx-small"</code>,
+<code>"x-small"</code>, <code>"small"</code>, <code>"medium"</code>,
+<code>"large"</code>,<code>"x-large"</code>,<code>"xx-large"</code>.
+</para></listitem>
+</varlistentry>
 </variablelist>
 </para>