I can't seem to figure out how to redo that supports multiple times with a similar quick shortcut.
Sorry if you know this...
You can switch undo to redo by hitting C-g
once. So it is not one shortcut key. The behavior is not like as ordinary editor. But I think it is very quick way of redo. See the behavior below.
Emacs undo state changes:
----example1------
time |typed |text
-----+------+-----
1 | |''
2 |'a' |'a'
3 |'b' |'ab'
4 |'c' |'abc'
5 |'d' |'abcd'
6 |udno |'abc'
7 |undo |'ab'
8 |undo |'a'
9 |undo |''
10 |C-g |'' <---switch
11 |undo |'a' <---redo!
12 |undo |'ab' <---redo!
13 |undo |'abc' <---redo!
14 |undo |'abcd' <---redo!
----example2------
time |typed |text
-----+------+-----
1 | |''
2 |'a' |'a'
3 |'b' |'ab'
4 |'c' |'abc'
5 |'d' |'abcd'
6 |udno |'abc'
7 |undo |'ab'
8 |undo |'a'
9 |undo |''
10 |C-g |'' <---switch
11 |undo |'a' <---redo!
12 |undo |'ab' <---redo!
13 |'x' |'abx' <---switch
14 |undo |'ab'
15 |undo |'a'
16 |C-g |'a' <---switch
17 |undo |'ab' <---redo!!
18 |undo |'abx' <---redo!!