Merge pull request #4304 from scherepn/fix-doc-build-errors

[ci skip] Fix mismatched brackets in documentation
diff --git a/user_guide_src/source/libraries/trackback.rst b/user_guide_src/source/libraries/trackback.rst
index 4e0cb55..bceb515 100644
--- a/user_guide_src/source/libraries/trackback.rst
+++ b/user_guide_src/source/libraries/trackback.rst
@@ -239,7 +239,7 @@
 		This method simply validates the incoming TB data, returning TRUE on success and FALSE on failure.
 		If the data is valid it is set to the ``$this->data`` array so that it can be inserted into a database.
 
-	.. php:method:: send_error([$message = 'Incomplete information')
+	.. php:method:: send_error([$message = 'Incomplete information'])
 
 		:param	string	$message: Error message
 		:rtype: void