Make docs on form_with_generates_ids config option match the value

[skip ci]

guides/source/configuring.md

@@ -592,7 +592,7 @@ Defaults to `'signed cookie'`.
 
 * `config.action_view.form_with_generates_remote_forms` determines whether `form_with` generates remote forms or not. This defaults to `true`.
 
-* `config.action_view.form_with_generates_ids` determines whether `form_with` generates ids on inputs. This defaults to `true`.
+* `config.action_view.form_with_generates_ids` determines whether `form_with` generates ids on inputs. This defaults to `false`.
 
 * `config.action_view.default_enforce_utf8` determines whether forms are generated with a hidden tag that forces older versions of Internet Explorer to submit forms encoded in UTF-8. This defaults to `false`.