[gtk-doc] Update the code listing style

[Stefan Kost <stefkost src gnome org>]

commit b4e00adad52c5d723f5c1a5f4d980131b36ce74b
Author: William Jon McCann <william jon mccann gmail com>
Date:   Mon Mar 3 17:10:58 2014 -0500

    Update the code listing style
    
    https://bugzilla.gnome.org/show_bug.cgi?id=725505

 style/style.css |   24 +++++++++++++-----------
 1 files changed, 13 insertions(+), 11 deletions(-)
---
diff --git a/style/style.css b/style/style.css
index 6a6aa3d..c141ddd 100644
--- a/style/style.css
+++ b/style/style.css
@@ -295,19 +295,21 @@ acronym,abbr
 
 /* code listings */
 
-.listing_code .programlisting .cbracket   { color: #a40000; } /* tango: scarlet red 3 */
-.listing_code .programlisting .comment    { color: #a1a39d; } /* tango: aluminium 4 */
-.listing_code .programlisting .function   { color: #000000; font-weight: bold; }
-.listing_code .programlisting .function a { color: #11326b; font-weight: bold; } /* tango: sky blue 4 */
-.listing_code .programlisting .keyword    { color: #4e9a06; } /* tango: chameleon 3  */
+.listing_code .programlisting .normal,
+.listing_code .programlisting .normal a,
+.listing_code .programlisting .number,
+.listing_code .programlisting .cbracket,
+.listing_code .programlisting .symbol     { color: #555753; }
+.listing_code .programlisting .comment,
 .listing_code .programlisting .linenum    { color: #babdb6; } /* tango: aluminium 3 */
-.listing_code .programlisting .normal     { color: #000000; }
-.listing_code .programlisting .number     { color: #75507b; } /* tango: plum 2 */
+.listing_code .programlisting .function,
+.listing_code .programlisting .function a,
 .listing_code .programlisting .preproc    { color: #204a87; } /* tango: sky blue 3  */
-.listing_code .programlisting .string     { color: #c17d11; } /* tango: chocolate 2 */
-.listing_code .programlisting .type       { color: #000000; }
-.listing_code .programlisting .type a     { color: #11326b; } /* tango: sky blue 4 */
-.listing_code .programlisting .symbol     { color: #ce5c00; } /* tango: orange 3 */
+.listing_code .programlisting .string     { color: #ad7fa8; } /* tango: plum */
+.listing_code .programlisting .keyword,
+.listing_code .programlisting .usertype,
+.listing_code .programlisting .type,
+.listing_code .programlisting .type a     { color: #4e9a06; } /* tango: chameleon 3  */
 
 .listing_frame {
   /* tango:sky blue 1 */