I ran into this output of portage today:
WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict:
(dev-libs/nettle-3.1.1:0/6::gentoo, ebuild scheduled for merge) conflicts with
<dev-libs/nettle-3[gmp,abi_x86_32(-),abi_x86_64(-)] required by (net-libs/gnutls-3.3.15-r1:0/0::gentoo, installed)
Cutting that a bit this part
seems to mis-highlight the version difference, pointing into to (a number in) the use flags fraction of the atom.
Not too much of a problem, but maybe you wanted to know or it's easy to fix.