Previously we had lost StrikeThrough, and this fixes a few other
discrepancies. This was generated on Ubuntu Noble (24.04), after
installing the following packages: ncurses-term kitty-terminfo
This fix is not perfect, in that it will not fix every terminal that has
automargin support, but it fixes the *vast* majority of them by eliminating
the hacky workaround for the automargin - essentially using the rmam capability
to disable automatic wrapping at the margin.
