minor symfony#14173 Use specialized config methods instead of the generic ifTrue() method (javiereguiluz)

This PR was merged into the 2.3 branch.

Discussion
----------

Use specialized config methods instead of the generic ifTrue() method

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
-------

dbd02b0 Use specialized config methods instead of the generic ifTrue() method

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php

@@ -69,10 +69,7 @@ public function getConfigTreeBuilder()
                 ->booleanNode('test')->end()
                 ->scalarNode('default_locale')->defaultValue('en')->end()
                 ->arrayNode('trusted_hosts')
-                    ->beforeNormalization()
-                        ->ifTrue(function ($v) { return is_string($v); })
-                        ->then(function ($v) { return array($v); })
-                    ->end()
+                    ->beforeNormalization()->ifString()->then(function ($v) { return array($v); })->end()
                     ->prototype('scalar')->end()
                 ->end()
             ->end()
@@ -263,7 +260,7 @@ private function addTemplatingSection(ArrayNodeDefinition $rootNode)
                                     ->addDefaultChildrenIfNoneSet()
                                     ->prototype('scalar')->defaultValue('FrameworkBundle:Form')->end()
                                     ->validate()
-                                        ->ifTrue(function ($v) {return !in_array('FrameworkBundle:Form', $v); })
+                                        ->ifNotInArray(array('FrameworkBundle:Form'))
                                         ->then(function ($v) {
                                             return array_merge(array('FrameworkBundle:Form'), $v);
                                         })

src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php

@@ -58,7 +58,7 @@ private function addFormSection(ArrayNodeDefinition $rootNode)
                             ->prototype('scalar')->defaultValue('form_div_layout.html.twig')->end()
                             ->example(array('MyBundle::form.html.twig'))
                             ->validate()
-                                ->ifTrue(function ($v) { return !in_array('form_div_layout.html.twig', $v); })
+                                ->ifNotInArray(array('form_div_layout.html.twig'))
                                 ->then(function ($v) {
                                     return array_merge(array('form_div_layout.html.twig'), $v);
                                 })