+test_file msg_16.txt msg_16-1.txt -r Received,List-Help,List-Post,List-Subscribe,List-Id,List-Unsubscribe,List-Archive
+test_file msg_16.txt msg_16-2.txt -r \*,-mime-version,-content-type
+test_file msg_29.txt msg_29-1.txt -R Content-Type:title
+test_file msg_18.txt msg_18-1.txt -R X-Foobar-Spoink-Defrobnit:\*