[ci skip] Merge pull request #5191 from jim-parry/patch/docs

Fix some mistakes in the user guide
diff --git a/user_guide_src/source/libraries/loader.rst b/user_guide_src/source/libraries/loader.rst
index 228d5e4..22abb45 100644
--- a/user_guide_src/source/libraries/loader.rst
+++ b/user_guide_src/source/libraries/loader.rst
@@ -125,7 +125,7 @@
 
 			$config = array (
 				'mailtype' => 'html',
-				'charset'  => 'utf-8,
+				'charset'  => 'utf-8',
 				'priority' => '1'
 			);