lib/mail/parsers/content_disposition.treetop in mail-2.1.5.3 vs lib/mail/parsers/content_disposition.treetop in mail-2.2.0

@@ -17,10 +17,10 @@
     rule disposition_type
       "inline" / "attachment" / extension_token / ''
     end
     
     rule extension_token
-      ietf_token / x_token
+      ietf_token / custom_x_token
     end
     
     rule parameter
       CFWS? attr:attribute "=" val:value CFWS? {
         def param_hash