Remove slash!

Signed-off-by: Eric Roberts <eric@cryode.com>
diff --git a/user_guide_src/source/libraries/form_validation.rst b/user_guide_src/source/libraries/form_validation.rst
index a5348b2..f48e140 100644
--- a/user_guide_src/source/libraries/form_validation.rst
+++ b/user_guide_src/source/libraries/form_validation.rst
@@ -466,7 +466,7 @@
 ======================
 
 All of the native error messages are located in the following language
-file: /system/language/english/form_validation_lang.php
+file: system/language/english/form_validation_lang.php
 
 To set your own custom message you can either edit that file, or use the
 following function::