[gtk-doc] md_to_db: also add the role="example" here

[Stefan Sauer <stefkost src gnome org>]

commit ffa6f45c73372562f326dab5044690b742cce409
Author: Stefan Sauer <ensonic users sf net>
Date:   Sun Mar 18 21:27:01 2018 +0100

    md_to_db: also add the role="example" here

 gtkdoc/md_to_db.py          |    4 ++--
 tests/gobject/src/gobject.c |    2 +-
 tests/mk_to_db.py           |    2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gtkdoc/md_to_db.py b/gtkdoc/md_to_db.py
index 0b64507..c8ff324 100644
--- a/gtkdoc/md_to_db.py
+++ b/gtkdoc/md_to_db.py
@@ -688,9 +688,9 @@ def MarkDownOutputDocBook(blocksref, symbol, context):
                     output += "<informalexample><screen><![CDATA[\n"
                     tag = "screen"
                 else:
-                    output += "<informalexample><programlisting language=\"%s\"><![CDATA[\n" % 
block['language']
+                    output += "<informalexample><programlisting role=\"example\" 
language=\"%s\"><![CDATA[\n" % block['language']
             else:
-                output += "<informalexample><programlisting><![CDATA[\n"
+                output += "<informalexample><programlisting role=\"example\"><![CDATA[\n"
 
             logging.debug('listing for %s: [%s]', symbol, '\n'.join(block['lines']))
             for line in block["lines"]:
diff --git a/tests/gobject/src/gobject.c b/tests/gobject/src/gobject.c
index e8bbf20..21fc8f8 100644
--- a/tests/gobject/src/gobject.c
+++ b/tests/gobject/src/gobject.c
@@ -50,7 +50,7 @@
  *
  * You can also change parameters:
  * <informalexample>
- * <programlisting language="c"><xi:include xmlns:xi="http://www.w3.org/2003/XInclude"; parse="text" 
href="../../examples/gobject.c" /></programlisting>
+ * <programlisting role="example" language="c"><xi:include xmlns:xi="http://www.w3.org/2003/XInclude"; 
parse="text" href="../../examples/gobject.c" /></programlisting>
  * </informalexample>
  *
  * This example serves two main purposes:
diff --git a/tests/mk_to_db.py b/tests/mk_to_db.py
index 0c6c8b2..8cc5978 100755
--- a/tests/mk_to_db.py
+++ b/tests/mk_to_db.py
@@ -221,7 +221,7 @@ accessed via the following functions.</para>
 """
 
         expected = '''\
-<informalexample><programlisting language="C"><![CDATA[
+<informalexample><programlisting role="example" language="C"><![CDATA[
     GdkEvent *event;
     GdkEventType type;