package.use should support comments, like #. I needed to add some comments to lines, in order to know, why I enabled/disabled a USE flag, but # causes --- Invalid atom in /etc/portage/package.use: # error message.
comments work just fine for me: # head /etc/portage/package.use # booga app-editors/nano nomac #sys-libs/libcap -python x11-wm/enlightenment nothemes app-emulation/qemu softmmu
that's strange, I've changed comments little bit and now it's ok. Unfortunately, I can't find out how to get this error message again... closed.