[valadoc] gtkdoc: Fix generated markup for source code blocks

[Florian Brosch <flobrosch src gnome org>]

commit 9d0548335f85d9f91a7c97532eba47e0c6c6d454
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed May 13 18:47:04 2015 +0200

    gtkdoc: Fix generated markup for source code blocks
    
    Just emitting <programlisting> doesn’t work, as gtk-doc will insert <para> tags in the middle of the code 
block, generating invalid markup.
    
    Instead of trying to reinvent how gtk-doc does things, just emit the gtk-doc shorthand markup for a code 
block and let gtk-doc generate the markup.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=725194

 src/doclets/gtkdoc/commentconverter.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/doclets/gtkdoc/commentconverter.vala b/src/doclets/gtkdoc/commentconverter.vala
index 6950a1a..450e751 100644
--- a/src/doclets/gtkdoc/commentconverter.vala
+++ b/src/doclets/gtkdoc/commentconverter.vala
@@ -228,9 +228,9 @@ public class Gtkdoc.CommentConverter : ContentVisitor {
        }
   
        public override void visit_source_code (SourceCode code) {
-               current_builder.append ("<programlisting>");
+               current_builder.append ("\n|[\n");
                current_builder.append (Markup.escape_text (code.code));
-               current_builder.append ("</programlisting>");
+               current_builder.append ("\n]|\n");
        }
   
        public override void visit_table (Table t) {