Fixed typos

Author: Tyler King

components/console/helpers/dialoghelper.rst

@@ -91,7 +91,7 @@ This methods has 2 new arguments, the full signature is::
 The ``$validator`` is a callback which handles the validation. It should
 throw an exception if there is something wrong. The exception message is displayed
 in the console, so it is a good practice to put some useful information in it. The callback 
-function should also return the value of the user's input if the validatation was successfull.
+function should also return the value of the user's input if the validation was successful.
 
 You can set the max number of times to ask in the ``$attempts`` argument.
 If you reach this max number it will use the default value, which is given