doc: properly specify the :css: interpreted text role in doxygen.rst.

diff --git a/doc/doxygen.rst b/doc/doxygen.rst
index 3775bf153fdf133635b5fd295c507192cba08488..f52b5f86d9fbdf75619559b4ea63b215a2f503b2 100644 (file)
--- a/doc/doxygen.rst
+++ b/doc/doxygen.rst
@@ -30,6 +30,8 @@ Doxygen theme
 
 .. role:: cpp(code)
     :language: cpp
+.. role:: css(code)
+    :language: css
 .. role:: html(code)
     :language: html
 .. role:: ini(code)