In vi mode in bash, There is no such thing as toggling case. The only key to toggle until the line is
<PageUp> key (as I by chance touched it). And according to this answer How to map PageDown and PageUp Keys to function normally the sequence xterm sends for
<PageUp> is this
If you access a Linux computer using an xterm emulator such as Putty, your PgUp key sends four characters Escape [ 5 ~ to the Linux system.
I have tried it on my shell, and it really does work. So the xterm accepts these sequences. So I have tried to add to by
set -o vi bind '"uu":"\eB\e[5~a"'
The important part is
\e[5~ - which is the
<PageUp> key. But despite working in cmd, it does not in
.basrc, why so?