These are the packages that would be merged, in order:

Calculating dependencies \
!!! All ebuilds that could satisfy ">=sys-apps/groff-1.19.2-r1" have been masked.
!!! One of the following masked packages is required to complete your request:
- sys-apps/groff-1.19.2-r2 (masked by: package.mask)
- sys-apps/groff-1.19.2-r1 (masked by: package.mask)

For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.
(dependency required by "sys-apps/man-1.6f-r2" [ebuild])