Merge branch '2.7' into 2.8

* 2.7:
  [SecurityBundle] Fix syntax error in test
  [Console] Remove remaining dead code
  bumped Symfony version to 2.7.39
  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