Lists ebuilds which inherit eclasses but doesn't use their features.
Following eclasses are checked:
ltprune, eutils, estack, preserve-libs, vcs-clean, epatch, desktop,
versionator, user, eapi7-ver, flag-o-matic, libtool, pam, udev, xdg-utils

Data Format ( 7|dev-libs/foo|foo-1.12-r2.ebuild|user:udev|dev@gentoo.org:loper@foo.de ):
7                                           EAPI Version
dev-libs/foo                                package category/name
foo-1.12-r2.ebuild                          full filename
user:udev                                   eclasse(s) the ebuild inherits but not uses, seperated by ':'
dev@gentoo.org:loper@foo.de                 maintainer(s), seperated by ':'