All reports of diff-contains-editor-backup-file for the archive. The extended description of this tag is:
The Debian diff or native package contains a file ending in ~ or of the form .xxx.swp, which is normally either an Emacs or vim backup file or a backup file created by programs such as autoheader or debconf-updatepo. This usually causes no harm, but it's messy and bloats the size of the Debian diff to no useful purpose.
This tag has not been emitted in any package tested by Lintian.