ALL_CAPS => sudo all_caps
So it appears something did actually change it. $ foo bar baz<cr>
^P^A<esc>u
$ FOO bar baz<cr>
As for ^T, I'd wholly forgotten about bind, inputrc and all that- but of course both your proposal and the above can be put into an inputrc macro and bound to a key. However the all caps version is shorter when you remember you need sudo in the first place ;). $ foo bar baz<cr>
^P^A<esc>u
$ FOO bar baz<cr>
That's three keystrokes less - even for the history (!!) version. :-)