Use single quotes in yaml files

api-platform/core/2.1/etc/packages/api_platform.yaml

@@ -1,3 +1,3 @@
 api_platform:
     loader_paths:
-        annotation: ["%kernel.project_dir%/src/Entity"]
+        annotation: ['%kernel.project_dir%/src/Entity']

doctrine/doctrine-bundle/1.6/etc/packages/doctrine.yaml

@@ -1,14 +1,14 @@
 doctrine:
     dbal:
-        url: "%env(DATABASE_URL)%"
+        url: '%env(DATABASE_URL)%'
     orm:
-        auto_generate_proxy_classes: "%kernel.debug%"
+        auto_generate_proxy_classes: '%kernel.debug%'
         naming_strategy: doctrine.orm.naming_strategy.underscore
         auto_mapping: true
         mappings:
             App:
                 is_bundle: false
                 type: annotation
-                dir: "%kernel.project_dir%/src/Entity"
-                prefix: "App\\Entity\\"
+                dir: '%kernel.project_dir%/src/Entity'
+                prefix: 'App\Entity\'
                 alias: App

easycorp/easy-log-handler/1.0/etc/packages/dev/easy-log-handler.yaml

@@ -2,7 +2,7 @@ services:
     easycorp.easylog.handler:
         class: EasyCorp\EasyLog\EasyLogHandler
         public: false
-        arguments: ["%kernel.logs_dir%/%kernel.environment%.log"]
+        arguments: ['%kernel.logs_dir%/%kernel.environment%.log']
 
 #// FIXME: How to add this configuration automatically without messing up with the monolog configuration?
 #monolog:
@@ -10,7 +10,7 @@ services:
 #        buffered:
 #            type:     buffer
 #            handler:  easylog
-#            channels: ["!event"]
+#            channels: ['!event']
 #            level:    debug
 #        easylog:
 #            type: service

javiereguiluz/easyadmin-bundle/1.16/etc/routing/easy_admin.yaml

@@ -1,4 +1,4 @@
 easy_admin_bundle:
-    resource: "@EasyAdminBundle/Controller/AdminController.php"
+    resource: '@EasyAdminBundle/Controller/AdminController.php'
     prefix: /admin
     type: annotation

lexik/jwt-authentication-bundle/2.3/etc/packages/lexik_jwt_authentication.yaml

@@ -1,4 +1,4 @@
 lexik_jwt_authentication:
-    private_key_path: "%env(JWT_PRIVATE_KEY_PATH)%"
-    public_key_path:  "%env(JWT_PUBLIC_KEY_PATH)%"
-    pass_phrase:      "%env(JWT_PASSPHRASE)%"
+    private_key_path: '%env(JWT_PRIVATE_KEY_PATH)%'
+    public_key_path:  '%env(JWT_PUBLIC_KEY_PATH)%'
+    pass_phrase:      '%env(JWT_PASSPHRASE)%'

sensiolabs/security-checker/4.0/etc/packages/dev/security-checker.yaml

@@ -5,6 +5,6 @@ services:
 
     sensio_distribution.security_checker.command:
         class: SensioLabs\Security\Command\SecurityCheckerCommand
-        arguments: ["@sensio_distribution.security_checker"]
+        arguments: ['@sensio_distribution.security_checker']
         tags:
             - { name: console.command }

symfony/framework-bundle/3.3/etc/packages/framework.yaml

@@ -1,5 +1,5 @@
 framework:
-    secret: "%env(APP_SECRET)%"
+    secret: '%env(APP_SECRET)%'
     #default_locale: en
     #csrf_protection: null
     #http_method_override: true
@@ -7,7 +7,7 @@ framework:
     # https://symfony.com/doc/current/reference/configuration/framework.html#handler-id
     #session:
     #    handler_id: session.handler.native_file
-    #    save_path: "%kernel.project_dir%/var/sessions/%kernel.environment%"
+    #    save_path: '%kernel.project_dir%/var/sessions/%kernel.environment%'
     #esi: ~
     #fragments: ~
     php_errors:

symfony/framework-bundle/3.3/etc/routing.yaml

@@ -1,6 +1,6 @@
 #index:
 #    path: /
-#    defaults: { _controller: "App\\Controller\\DefaultController::index" }
+#    defaults: { _controller: 'App\Controller\DefaultController::index' }
 
 # Depends on sensio/framework-extra-bundle:^3.0 and doctrine/annotations
 #controllers:

symfony/swiftmailer-bundle/2.5/etc/packages/swiftmailer.yaml

@@ -1,3 +1,3 @@
 swiftmailer:
-    url: "%env(MAILER_URL)%"
-    spool: { type: "memory" }
+    url: '%env(MAILER_URL)%'
+    spool: { type: 'memory' }

symfony/twig-bundle/3.3/etc/packages/twig.yaml

@@ -1,4 +1,4 @@
 twig:
-    paths: ["%kernel.project_dir%/templates"]
-    debug: "%kernel.debug%"
-    strict_variables: "%kernel.debug%"
+    paths: ['%kernel.project_dir%/templates']
+    debug: '%kernel.debug%'
+    strict_variables: '%kernel.debug%'

symfony/twig-bundle/3.3/etc/routing/dev/twig.yaml

@@ -1,3 +1,3 @@
 _errors:
-    resource: "@TwigBundle/Resources/config/routing/errors.xml"
+    resource: '@TwigBundle/Resources/config/routing/errors.xml'
     prefix:   /_errors

symfony/web-profiler-bundle/3.3/etc/routing/dev/web_profiler.yaml

@@ -1,7 +1,7 @@
 web_profiler_wdt:
-    resource: "@WebProfilerBundle/Resources/config/routing/wdt.xml"
+    resource: '@WebProfilerBundle/Resources/config/routing/wdt.xml'
     prefix: /_wdt
 
 web_profiler_profiler:
-    resource: "@WebProfilerBundle/Resources/config/routing/profiler.xml"
+    resource: '@WebProfilerBundle/Resources/config/routing/profiler.xml'
     prefix: /_profiler