utf8: add strikethrough
utf8: add strikethrough

Former-commit-id: 5f76933a2f771a32ec23679f9b4e3ed6c2ee3bc7
Former-commit-id: 116fcc7984875503f4688c9926ff102d5cc0ea3f
haste/ivar2,torhve/ivar2,torhve/ivar2,torhve/ivar2