Junio C Hamano [off-list ref] writes:
What is sad for me is that I usually work in GNU screen, displaying
on either xterm or gnome-terminal. Without screen, strike shows but
inside it I cannot seem to be able to get strike-thru in effect.
... which unfortunately is expected.
https://www.gnu.org/software/screen/manual/screen.html#Control-Sequences
(look for a string "Negative Image" that appears only once)
indicates that 9/29 are missing.
Not fun X-<.