Add example configuration for ProblemDetailsResponseFactoryFactory …

…in response.md

Signed-off-by: pascal.heidmann <[email protected]>

docs/book/response.md

@@ -141,21 +141,32 @@ This package also provides a factory for generating the
 - Pulls the `Psr\Http\Message\ResponseInterface` service to provide as the
   `$responseFactory` parameter.
 - If a `config` service is present:
-  - If the service contains a `debug` key with a boolean value, that value is
-    provided as the `$isDebug` parameter.
-  - If the service contains a `problem-details` key with an array value
-    containing a `json_flags` key, and that value is an integer, that value is
-    provided as the `$jsonFlags` parameter.
-  - If the service contains a `problem-details` key with an array value
-    containing a `default_types_map` key, and that value is an array, that
-    value is provided as the `$defaultTypesMap` parameter; see the
-    [default types documentation](default-types.md) for details on defining
-    this map. (Since 1.1.0.)
-  - If the service contains a `problem-details` key with an array value
-    containing a `include-throwable-details` key,
-    and that value is a boolean,
-    that value is used instead of global `debug` value for the `$includeThrowableDetail` parameter.
-    (Since 1.14.0.)
+    - If the service contains a `debug` key with a boolean value, that value is
+      provided as the `$isDebug` parameter.
+    - If the service contains a `problem-details` key with an array value
+      containing a `json_flags` key, and that value is an integer, that value is
+      provided as the `$jsonFlags` parameter.
+    - If the service contains a `problem-details` key with an array value
+      containing a `default_types_map` key, and that value is an array, that
+      value is provided as the `$defaultTypesMap` parameter; see the
+      [default types documentation](default-types.md) for details on defining
+      this map. (Since 1.1.0.)
+    - If the service contains a `problem-details` key with an array value
+      containing a `include-throwable-details` key,
+      and that value is a boolean,
+      that value is used instead of global `debug` value for the `$includeThrowableDetail` parameter.
+      (Since 1.14.0.)
+
+### Example configuration
+```php
+[
+    'debug' => true,
+    'problem-details' => [
+        'json_flags' => JSON_PRETTY_PRINT,
+        'include-throwable-details' => true,
+    ]
+]
+```
 
 If any of the above config values are not present, a `null` value will be
 passed, allowing the default value to be used.