Merge pull request #90 from jbinard/master

Fixed issue #7915: Export to R -> Bug with answers containing double quotes

application/controllers/admin/export.php

@@ -787,6 +787,7 @@ public function exportr()
                         $str = "";
                         foreach ( $answers as $answer )
                         {
+                            $answer['value'] = str_replace("\"", "\\\"", $answer['value']); // Escape double quotes
                             $str .= ", \"{$answer['value']}\"";
                         }