[ci skip] Fix class reference sections of Image_lib, Parser and User agent docs
diff --git a/user_guide_src/source/libraries/parser.rst b/user_guide_src/source/libraries/parser.rst
index 50bde82..34ad65f 100644
--- a/user_guide_src/source/libraries/parser.rst
+++ b/user_guide_src/source/libraries/parser.rst
@@ -147,7 +147,7 @@
 Class Reference
 ***************
 
-.. class: CI_Parser
+.. class:: CI_Parser
 
 	.. method:: parse($template, $data[, $return = FALSE])