content_transfer_encoding.treetop in mail-2.1.5

- old
+ new

@@ -3,23 +3,18 @@
 
     include RFC2822
     include RFC2045
 
     rule primary
-      CFWS encoding CFWS
+      CFWS encoding CFWS ";"? CFWS
     end
     
     rule encoding
-      known_tokens / ietf_token / x_token {
-        def encoding
-          known_tokens.text_value || ietf_token.text_value || x_token.text_value
+      ietf_token "s"? {
+        def text_value
+          ietf_token.text_value
         end
-      }
-    end
-    
-    rule known_tokens
-      "7bit" / "8bit" / "binary" / 
-      "quoted-printable" / "base64"
+      } / x_token
     end
     
   end
 end
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