Change revision command error message format
Change revision command error message format

[#174107413](https://www.pivotaltracker.com/story/show/174107413)

Co-authored-by: Lisa Burns <bf777798bf9b27b432e8740a4233c0b7af91e7d5@vmware.com>
Co-authored-by: Alexander Berezovsky <a12e46294a7d630b60bbba114755367d6bafe2fb@vmware.com>

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli