Merge branch '2.8' into 3.3

* 2.8:
  [SecurityBundle] Fix syntax error in test
  [Console] Remove remaining dead code
  bumped Symfony version to 2.8.32
  bumped Symfony version to 2.7.39
  updated VERSION for 2.8.31
  updated CHANGELOG for 2.8.31
  updated VERSION for 2.7.38
  updated CHANGELOG for 2.7.38
  Replace array|\Traversable by iterable
  Fix ambiguous pattern

Author: nicolas-grekas

Data/Bundle/Writer/TextBundleWriter.php

@@ -195,11 +195,11 @@ private function writeArray($file, array $value, $indentation)
     /**
      * Writes a "table" node.
      *
-     * @param resource           $file        The file handle to write to
-     * @param array|\Traversable $value       The value of the node
-     * @param int                $indentation The number of levels to indent
-     * @param bool               $fallback    Whether the table should be merged
-     *                                        with the fallback locale
+     * @param resource $file        The file handle to write to
+     * @param iterable $value       The value of the node
+     * @param int      $indentation The number of levels to indent
+     * @param bool     $fallback    Whether the table should be merged
+     *                              with the fallback locale
      *
      * @throws UnexpectedTypeException when $value is not an array and not a
      *                                 \Traversable instance