Replace more docblocks by type-hints

Author: nicolas-grekas

OptionsResolver.php

@@ -976,15 +976,12 @@ public function count()
      * non-technical people.
      *
      * @param mixed  $value The value to return the type of
-     * @param string $type
-     *
-     * @return string The type of the value
      */
-    private function formatTypeOf($value, $type)
+    private function formatTypeOf($value, ?string $type): string
     {
         $suffix = '';
 
-        if ('[]' === substr($type, -2)) {
+        if (null !== $type && '[]' === substr($type, -2)) {
             $suffix = '[]';
             $type = substr($type, 0, -2);
             while ('[]' === substr($type, -2)) {
@@ -1017,10 +1014,8 @@ private function formatTypeOf($value, $type)
      * in double quotes (").
      *
      * @param mixed $value The value to format as string
-     *
-     * @return string The string representation of the passed value
      */
-    private function formatValue($value)
+    private function formatValue($value): string
     {
         if (is_object($value)) {
             return get_class($value);
@@ -1059,13 +1054,9 @@ private function formatValue($value)
      * Each of the values is converted to a string using
      * {@link formatValue()}. The values are then concatenated with commas.
      *
-     * @param array $values A list of values
-     *
-     * @return string The string representation of the value list
-     *
      * @see formatValue()
      */
-    private function formatValues(array $values)
+    private function formatValues(array $values): string
     {
         foreach ($values as $key => $value) {
             $values[$key] = $this->formatValue($value);