Fix a typo in security/impersonating_user.rst

nouwaarom · web-flow · commit cdb0e4f2b5a9 · 2018-09-11T10:41:37.000+02:00
diff --git a/security/impersonating_user.rst b/security/impersonating_user.rst
@@ -91,7 +91,7 @@ to show a link to exit impersonation:
 
 In some cases you may need to get the object that represents the impersonator
 user rather than the impersonated user. Use the following snippet to iterate
-over the user's roles until you find one that a ``SwitchUserRole`` object::
+over the user's roles until you find one that is a ``SwitchUserRole`` object::
 
     use Symfony\Component\Security\Core\Role\SwitchUserRole;
 
