fixed a title

fabpot · fabpot · commit 15b6c3ca9deb · 2011-03-20T19:34:13.000+01:00
diff --git a/cookbook/validation/custom_constraint.rst b/cookbook/validation/custom_constraint.rst
@@ -1,8 +1,8 @@
 .. index::
    single: Validation; Custom constraints
 
-How can I create a Custom Validation Constraint?
-------------------------------------------------
+How to create a Custom Validation Constraint
+--------------------------------------------
 
 You can create a custom constraint by extending the base constraint class,
 :class:`Symfony\\Component\\Validator\\Constraint`. Options for your
