Fix strange bug for russian language search results

Summary:
I created this review to get an answer...
It should not be taken as a real fix.

I noticed that phabricator return corrupted search results for some russian queries (without this patch).
See screenshot:
{F147443}

But I can't reproduce this bug on https://secure.phabricator.com/
This search query causes problems only for my phabricator instance.

More than that, I didn't find any php.ini-settings that can resolve this problem.
It's look like your phabricator instance use /u-modifier by default.

But how is it possible?

Test Plan: NONE

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D8859

src/applications/search/view/PhabricatorSearchResultView.php

@@ -89,7 +89,7 @@ final class PhabricatorSearchResultView extends AphrontView {
     $quoted_queries = $matches[1];
     $query = preg_replace($quoted_regexp, '', $query);
 
-    $query = preg_split('/\s+[+|]?/', $query);
+    $query = preg_split('/\s+[+|]?/u', $query);
     $query = array_filter($query);
     $query = array_merge($query, $quoted_queries);
     $str = phutil_escape_html($str);