Fix issue #938 + some related improvements
diff --git a/user_guide_src/source/libraries/config.rst b/user_guide_src/source/libraries/config.rst
index 08d9c29..6948963 100644
--- a/user_guide_src/source/libraries/config.rst
+++ b/user_guide_src/source/libraries/config.rst
@@ -175,7 +175,7 @@
 as to a stylesheet or image.
 
 The two functions above are normally accessed via the corresponding
-functions in the :doc:`URL Helper </helpers/url_helper>`.
+functions in the :doc:`URL Helper <helpers/url_helper>`.
 
 $this->config->system_url();
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