minor symfony#10184 [Console] $default can be string (Jmoati)

This PR was submitted for the 2.3-dev branch but it was merged into the 2.3 branch instead (closes symfony#10184).

Discussion
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[Console] $default can be string

Bug fix: no
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
License of the code: MIT

Commits
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39ab7f3 [Console] $default can be string

Author: fabpot

src/Symfony/Component/Console/Helper/DialogHelper.php

@@ -31,7 +31,7 @@ class DialogHelper extends Helper
      * @param OutputInterface $output       An Output instance
      * @param string|array    $question     The question to ask
      * @param array           $choices      List of choices to pick from
-     * @param Boolean         $default      The default answer if the user enters nothing
+     * @param Boolean|string  $default      The default answer if the user enters nothing
      * @param Boolean|integer $attempts Max number of times to ask before giving up (false by default, which means infinite)
      * @param string          $errorMessage Message which will be shown if invalid value from choice list would be picked
      * @param Boolean         $multiselect  Select more than one value separated by comma