Apparently nvim assumes cnorm doesn't affect cursor shape. It's
ambiguous whether cnorm should affect it or not. So to prevent
regressions in case other programs assume that as well, have it only
make the cursor visible and blinking, without changing its shape.
Since the geniuses at terminal-wg are trying their best to create chaos
by retroactively changing the escape code used for this feature, it is
good to have a property for it in terminfo. Since tmux already uses Sync
for it, follow that in kitty's terminfo.
A couple of other terminals use it for styled underlines, in
contravention of the spec. But, in the interests of wider
interoperability add it to kitty as well.
Fixes#3725
The termcap aliases are not standard, but they are used by Vim, it
seems. As far as I can tell, there are no standard termcap attribute for
strikethrough.
In OSC/OTH mode, the parser accumulate bytes until it fills up or
encounters some end-of-osc sequence.
After entering in either of these mode by mistake, for example by
displaying random bytes (e.g. cat a binary) nothing would print anymore
but input would still work.
In that situation, being able to hit `reset` and recover a usable
terminal helps.
You can try with `echo -e '\xc2\x9e'` for PM
