[Help-bash] How to make vi-insert mode's ctrl-w work in the 4.3 way?

[Clark Wang]

For example, if I have inputted the following after the prompt:

# foo "abc"

In bash 4.3's vi-insert mode, when I press ctrl-w it'll delete the whole
"abc" (including quotes). But with 4.4 I have to press ctrl-w for 3 times
(one for the right " char, one for abc and one for the left " char).

I tried following but none would work for me:

    bind -m vi-insert '"\C-w": vi-unix-word-rubout'
    bind -m vi-insert '"\C-w": unix-word-rubout'
    bind -m vi-insert '"\C-w": vi-rubout'
    bind -m vi-insert '"\C-w": shell-backward-kill-word'
    bind -m vi-insert '"\C-w": backward-kill-word'
    bind -m vi-insert '"\C-w": kill-word'

-clark