Use new array with quoted words to prevent recurrsive adding of escape symbols

Author: denchev

app/code/Magento/Search/Model/SynonymAnalyzer.php

@@ -137,10 +137,10 @@ private function getSearchPattern(array $words): string
     {
         $patterns = [];
         for ($lastItem = count($words); $lastItem > 0; $lastItem--) {
-            $words = array_map(function ($word) {
-                return preg_quote(stripslashes($word), '/');
+            $safeRegexWords = array_map(function ($word) {
+                return preg_quote($word, '/');
             }, $words);
-            $phrase = implode("\s+", \array_slice($words, 0, $lastItem));
+            $phrase = implode("\s+", \array_slice($safeRegexWords, 0, $lastItem));
             $patterns[] = '^' . $phrase . ',';
             $patterns[] = ',' . $phrase . ',';
             $patterns[] = ',' . $phrase . '$';