fix build errors

Author: xabbuh

components/debug.rst

@@ -31,8 +31,8 @@ Enabling them all is as easy as it can get::
 
 The :method:`Symfony\\Component\\Debug\\Debug::enable` method registers an
 error handler and an exception handler. If the :doc:`ClassLoader component
-</components/class_loader>` is available, a special class loader is also
-registered.
+</components/class_loader/introduction>` is available, a special class loader
+is also registered.
 
 Read the following sections for more information about the different available
 tools.

components/intl.rst

@@ -51,8 +51,9 @@ replace the intl classes:
 Composer automatically exposes these classes in the global namespace.
 
 If you don't use Composer but the
-:doc:`Symfony ClassLoader component</components/class_loader>`, you need to
-expose them manually by adding the following lines to your autoload code::
+:doc:`Symfony ClassLoader component </components/class_loader/introduction>`,
+you need to expose them manually by adding the following lines to your autoload
+code::
 
     if (!function_exists('intl_is_failure')) {
         require '/path/to/Icu/Resources/stubs/functions.php';

cookbook/form/dynamic_form_modification.rst

@@ -475,7 +475,7 @@ On a form, we can usually listen to the following events:
     below example uses.
 
 The key is to add a ``POST_SUBMIT`` listener to the field that your new field
-depends on. If you add a ``POST_SUBMIT`` listener to a form child (e.g. ``sport`),
+depends on. If you add a ``POST_SUBMIT`` listener to a form child (e.g. ``sport``),
 and add new children to the parent form, the Form component will detect the
 new field automatically and map it to the submitted client data.