`Ctrl-U` should delete the line from the cursor position, not the entire line

[9999years]

In Fish and Bash, when I press Ctrl-U, it deletes the input line from the cursor position, not the entire line. If | is my cursor:

> a b c|
> a b| c
Press Ctrl-U
> | c

But editline deletes the entire line:

> a b c|
> a b| c
Press Ctrl-U
> |