[vala/0.36] manual: Update from wiki.gnome.org

[Rico Tzschichholz <ricotz src gnome org>]

commit fd224c7b252d8511b69bcbf6a47f59ecd70be565
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon May 21 21:47:16 2018 +0200

    manual: Update from wiki.gnome.org

 doc/manual/manual.xml |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/doc/manual/manual.xml b/doc/manual/manual.xml
index 229a2b8..7c35458 100644
--- a/doc/manual/manual.xml
+++ b/doc/manual/manual.xml
@@ -1224,13 +1224,13 @@
 <title>Examples</title>
 <para>Demonstrating... </para><programlisting format="linespecific" language="highlight" 
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