Fix code examples in PHPDoc

Author: maidmaid

OptionsResolver.php

@@ -360,11 +360,9 @@ public function getDefinedOptions()
      *
      * The normalizer should be a closure with the following signature:
      *
-     * ```php
-     * function (Options $options, $value) {
-     *     // ...
-     * }
-     * ```
+     *     function (Options $options, $value) {
+     *         // ...
+     *     }
      *
      * The closure is invoked when {@link resolve()} is called. The closure
      * has access to the resolved values of other options through the passed

OptionsResolverInterface.php

@@ -29,10 +29,8 @@ interface OptionsResolverInterface
      * evaluate the option value lazily. These closures must have one
      * of the following signatures:
      *
-     * <code>
-     * function (Options $options)
-     * function (Options $options, $value)
-     * </code>
+     *     function (Options $options)
+     *     function (Options $options, $value)
      *
      * The second parameter passed to the closure is the previously
      * set default value, in case you are overwriting an existing
@@ -154,9 +152,7 @@ public function addAllowedTypes($allowedTypes);
      *
      * The normalizers should be closures with the following signature:
      *
-     * <code>
-     * function (Options $options, $value)
-     * </code>
+     *     function (Options $options, $value)
      *
      * The second parameter passed to the closure is the value of
      * the option.