sci-biology/emboss/files/README.Gentoo sci-biology/emboss/files/README.gentoo sci-biology/emboss/files/emboss-README.Gentoo-1 sci-biology/emboss/files/emboss-README.Gentoo-2 These all seem to be slight variations on the same file. From the timestamps, I'm guessing README.gentoo is the one that should be used.
And each ebuild is using only the proper one, the files will be cleaned as soon as 6.6.0 version is stabilized and older ones (using old files) are cleaned