Fixed comment in code to reflect MARCXML, not MARC21, output
Fixed comment in code to reflect MARCXML, not MARC21, output

git-svn-id: 11d8d81c4a3b0f6d274c335c69213a0581d5d37c@659 4dc5e89f-90f6-0310-ab54-a6a856e7c30e

ruby-marc/ruby-marc