Parser does not concatenates all the strings when parsing

When parsing a Route53 DNS record containing a " such as 
"v=DKIM1; k=rsa; p=MIGfMA0GCSqG....x59/8qdGvAo+S5xwIDAQAB", the parser just retains the last double quote.

lib/fog/core/parser.rb

@@ -15,7 +15,8 @@ module Fog
       end
 
       def characters(string)
-        @value = string
+        @value ||= ''
+        @value << string
       end
 
       def start_element(name, attrs = [])