Does that obsolete the other patch and is this ok for any posix shell?

In D20974#459863, @cullmann wrote:

Does that obsolete the other patch

That was my hope

and is this ok for any posix shell?

My source was this general looking question. But reading there indicate that they all refer to Bash :-/
https://stackoverflow.com/questions/9679776/how-do-i-clear-delete-the-current-line-in-terminal

OTH is there https://www.unix.com/man-page/All/1posix/sh some vi mode described.

kill Clear all the characters from the input line.

Whatever that means. "less" at least works here similar. No Guru around? :-)
And, isn't Kate also running on Windows? What's then?

This is not an issue on Windows (yet?) as the whole konsole plugin is disabled on Windows.

Ctrl-U is "Cut everything before the cursor", so if you have moved the cursor to the beginning of the line nothing is removed...

So we would need to send Ctrl-E before Ctrl-U.

I tried these with sh and I could remove the line with Ctrl-U.

I think there is always going to be some corner case where this will not work, but better than nothing?....