quote YAML strings starting with % or @ characters

Pygment uses the YAML 1.1 standard to parse YAML code being highlighted.
A string value cannot start with the percent sign or the @ character
in YAML 1.1 without being quoted. To highlight the YAML code blocks
properly, strings starting with the percent sign are now enclosed in
double quotes.

Author: xabbuh

book/internals.rst

@@ -621,7 +621,7 @@ If you enable the web profiler, you also need to mount the profiler routes:
     .. code-block:: yaml
 
         _profiler:
-            resource: @WebProfilerBundle/Resources/config/routing/profiler.xml
+            resource: "@WebProfilerBundle/Resources/config/routing/profiler.xml"
             prefix:   /_profiler
 
     .. code-block:: xml

cookbook/configuration/using_parameters_in_dic.rst

@@ -36,7 +36,7 @@ Now, examine the results to see this closely:
             # true, as expected
 
         my_bundle:
-            logging: %kernel.debug%
+            logging: "%kernel.debug%"
             # true/false (depends on 2nd parameter of AppKernel),
             # as expected, because %kernel.debug% inside configuration
             # gets evaluated before being passed to the extension

reference/configuration/doctrine.rst

@@ -59,8 +59,8 @@ Full default configuration
                         MultipleActiveResultSets:  ~
                         driver:               pdo_mysql
                         platform_service:     ~
-                        logging:              %kernel.debug%
-                        profiling:            %kernel.debug%
+                        logging:              "%kernel.debug%"
+                        profiling:            "%kernel.debug%"
                         driver_class:         ~
                         wrapper_class:        ~
                         options:
@@ -106,7 +106,7 @@ Full default configuration
             orm:
                 default_entity_manager:  ~
                 auto_generate_proxy_classes:  false
-                proxy_dir:            %kernel.cache_dir%/doctrine/orm/Proxies
+                proxy_dir:            "%kernel.cache_dir%/doctrine/orm/Proxies"
                 proxy_namespace:      Proxies
                 # search for the "ResolveTargetEntityListener" class for a cookbook about this
                 resolve_target_entities: []
@@ -416,7 +416,7 @@ Shortened Configuration Syntax
 ------------------------------
 
 When you are only using one entity manager, all config options available
-can be placed directly under ``doctrine.orm`` config level. 
+can be placed directly under ``doctrine.orm`` config level.
 
 .. code-block:: yaml
 

reference/configuration/framework.rst

@@ -103,19 +103,19 @@ have installed `PhpStormOpener`_ and use PHPstorm, you will do something like:
 
         framework:
             ide: "pstorm://%%f:%%l"
-            
+
     .. code-block:: xml
-    
+
         <?xml version="1.0" charset="UTF-8" ?>
         <container xmlns="http://symfony.com/schema/dic/service"
             xmlns:framework="http://symfony.com/schema/dic/symfony">
-            
+
             <framework:config ide="pstorm://%%f:%%l" />
-            
+
         </container>
-        
+
     .. code-block:: php
-    
+
         $container->loadFromExtension('framework', array(
             'ide' => 'pstorm://%%f:%%l',
         ));
@@ -536,7 +536,7 @@ Full default Configuration
                 gc_divisor:           ~
                 gc_probability:       ~
                 gc_maxlifetime:       ~
-                save_path:            %kernel.cache_dir%/sessions
+                save_path:            "%kernel.cache_dir%/sessions"
 
             # serializer configuration
             serializer:
@@ -545,7 +545,7 @@ Full default Configuration
             # templating configuration
             templating:
                 assets_version:       ~
-                assets_version_format:  %%s?%%s
+                assets_version_format:  "%%s?%%s"
                 hinclude_default_template:  ~
                 form:
                     resources:
@@ -566,7 +566,7 @@ Full default Configuration
                     # Prototype
                     name:
                         version:              ~
-                        version_format:       %%s?%%s
+                        version_format:       "%%s?%%s"
                         base_urls:
                             http:                 []
                             ssl:                  []
@@ -586,8 +586,8 @@ Full default Configuration
             # annotation configuration
             annotations:
                 cache:                file
-                file_cache_dir:       %kernel.cache_dir%/annotations
-                debug:                %kernel.debug%
+                file_cache_dir:       "%kernel.cache_dir%/annotations"
+                debug:                "%kernel.debug%"
 
 .. _`protocol-relative`: http://tools.ietf.org/html/rfc3986#section-4.2
 .. _`PhpStormOpener`: https://github.com/pinepain/PhpStormOpener