Merge branch 'ab/replace-graft-with-replace-advice'

The advice message to tell the user to migrate an existing graft file to the replace system when a graft file was read was shown even when "git replace --convert-graft-file" command, which is the way the message suggests to use, was running, which made little sense. * ab/replace-graft-with-replace-advice: advice: don't pointlessly suggest --convert-graft-file