minor symfony#17293 [HttpFoundation] Add missing apostrophe in setSaveHandler phpdoc (pawel-lewtak)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes symfony#17293).

Discussion
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[HttpFoundation] Add missing apostrophe in setSaveHandler phpdoc

| Q             | A
| ------------- | ---
| Fixed tickets |
| License       | MIT

I fixed php code in comment to one of functions as it couldn't be used with simple copy and paste.

Commits
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e32f5a2 Add missing apostrophe in setSaveHandler phpdoc

Author: fabpot

src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php

@@ -351,7 +351,7 @@ public function setOptions(array $options)
      * session.save_handler and session.save_path e.g.
      *
      *     ini_set('session.save_handler', 'files');
-     *     ini_set('session.save_path', /tmp');
+     *     ini_set('session.save_path', '/tmp');
      *
      * or pass in a NativeSessionHandler instance which configures session.save_handler in the
      * constructor, for a template see NativeFileSessionHandler or use handlers in