Tweak

Author: javiereguiluz

reference/constraints/Email.rst

@@ -135,7 +135,7 @@ address. Valid values are:
 
 * ``loose``, it uses a simple regular expression to validate the address (it
   checks that at least one ``@`` character is present, etc.). This validation is
-  very simple and it's recommended to use one of the other methods instead;
+  too simple and it's recommended to use one of the other modes instead;
 * ``html5``, it validates email addresses using the same regular expression
   as the `HTML5 email input element`_, making the backend validation consistent
   with the one provided by browsers;