diff --git a/components/dependency_injection/configurators.rst b/components/dependency_injection/configurators.rst
index 109b250ae8e..3c7fedf04ed 100644
--- a/components/dependency_injection/configurators.rst
+++ b/components/dependency_injection/configurators.rst
@@ -145,7 +145,7 @@ The service config for the above classes would look something like this:
             newsletter_manager:
                 class:     NewsletterManager
                 calls:
-                    - [setMailer, ["@my_mailer"]]
+                    - [setMailer, ['@my_mailer']]
                 configurator: ['@email_configurator', configure]
 
             greeting_card_manager:
diff --git a/components/dependency_injection/factories.rst b/components/dependency_injection/factories.rst
index 8807975d5f8..0f1af359092 100644
--- a/components/dependency_injection/factories.rst
+++ b/components/dependency_injection/factories.rst
@@ -152,7 +152,7 @@ method in the previous example takes the ``templating`` service as an argument:
                 factory_service:  newsletter_manager_factory
                 factory_method:   createNewsletterManager
                 arguments:
-                    - "@templating"
+                    - '@templating'
 
     .. code-block:: xml
 
diff --git a/components/dependency_injection/introduction.rst b/components/dependency_injection/introduction.rst
index b71ac5a926a..42c526652fd 100644
--- a/components/dependency_injection/introduction.rst
+++ b/components/dependency_injection/introduction.rst
@@ -243,7 +243,7 @@ config files:
             newsletter_manager:
                 class:     NewsletterManager
                 calls:
-                    - [setMailer, ["@mailer"]]
+                    - [setMailer, ['@mailer']]
 
     .. code-block:: xml
 
diff --git a/components/dependency_injection/parentservices.rst b/components/dependency_injection/parentservices.rst
index 1afcf43b72c..aa1ec8622d8 100644
--- a/components/dependency_injection/parentservices.rst
+++ b/components/dependency_injection/parentservices.rst
@@ -192,8 +192,8 @@ a parent for a service.
             mail_manager:
                 abstract:  true
                 calls:
-                    - [setMailer, ["@my_mailer"]]
-                    - [setEmailFormatter, ["@my_email_formatter"]]
+                    - [setMailer, ['@my_mailer']]
+                    - [setEmailFormatter, ['@my_email_formatter']]
 
             newsletter_manager:
                 class:  "NewsletterManager"
@@ -320,17 +320,17 @@ to the ``NewsletterManager`` class, the config would look like this:
             mail_manager:
                 abstract: true
                 calls:
-                    - [setMailer, ["@my_mailer"]]
-                    - [setEmailFormatter, ["@my_email_formatter"]]
+                    - [setMailer, ['@my_mailer']]
+                    - [setEmailFormatter, ['@my_email_formatter']]
 
             newsletter_manager:
-                class:  "NewsletterManager"
+                class:  'NewsletterManager'
                 parent: mail_manager
                 calls:
-                    - [setMailer, ["@my_alternative_mailer"]]
+                    - [setMailer, ['@my_alternative_mailer']]
 
             greeting_card_manager:
-                class:  "GreetingCardManager"
+                class:  'GreetingCardManager'
                 parent: mail_manager
 
     .. code-block:: xml
diff --git a/components/dependency_injection/types.rst b/components/dependency_injection/types.rst
index 87dd02b87c7..3799fdf8ace 100644
--- a/components/dependency_injection/types.rst
+++ b/components/dependency_injection/types.rst
@@ -126,7 +126,7 @@ that accepts the dependency::
             newsletter_manager:
                 class:     NewsletterManager
                 calls:
-                    - [setMailer, ["@my_mailer"]]
+                    - [setMailer, ['@my_mailer']]
 
     .. code-block:: xml
 
diff --git a/cookbook/logging/monolog.rst b/cookbook/logging/monolog.rst
index e3a25bd2a02..e6d66b9469e 100644
--- a/cookbook/logging/monolog.rst
+++ b/cookbook/logging/monolog.rst
@@ -347,7 +347,7 @@ using a processor.
 
             monolog.processor.session_request:
                 class: AppBundle\SessionRequestProcessor
-                arguments:  ["@session"]
+                arguments:  ['@session']
                 tags:
                     - { name: monolog.processor, method: processRecord }
 
@@ -446,7 +446,7 @@ the ``monolog.processor`` tag:
         services:
             monolog.processor.session_request:
                 class: AppBundle\SessionRequestProcessor
-                arguments:  ["@session"]
+                arguments:  ['@session']
                 tags:
                     - { name: monolog.processor, method: processRecord, handler: main }
 
@@ -497,7 +497,7 @@ the ``monolog.processor`` tag:
         services:
             monolog.processor.session_request:
                 class: AppBundle\SessionRequestProcessor
-                arguments:  ["@session"]
+                arguments:  ['@session']
                 tags:
                     - { name: monolog.processor, method: processRecord, channel: main }
 
diff --git a/cookbook/service_container/scopes.rst b/cookbook/service_container/scopes.rst
index 5aa114d50d1..bb58aaf938f 100644
--- a/cookbook/service_container/scopes.rst
+++ b/cookbook/service_container/scopes.rst
@@ -149,7 +149,7 @@ your code. This should also be taken into account when declaring your service:
             greeting_card_manager:
                 class: AppBundle\Mail\GreetingCardManager
                 calls:
-                    - [setRequest, ["@?request="]]
+                    - [setRequest, ['@?request=']]
 
     .. code-block:: xml
 
diff --git a/reference/configuration/twig.rst b/reference/configuration/twig.rst
index 15c1170299a..9097d55e613 100644
--- a/reference/configuration/twig.rst
+++ b/reference/configuration/twig.rst
@@ -21,7 +21,7 @@ TwigBundle Configuration ("twig")
             globals:
 
                 # Examples:
-                foo:                 "@bar"
+                foo:                 '@bar'
                 pi:                  3.14
 
                 # Example options, but the easiest use is as seen above