Emacs Repeat complex command

A very useful friend to make a elisp function starting from your….last command

C-x ESC ESC (translated from C-x <escape> <escape>) runs the command
repeat-complex-command (found in global-map), which is an interactive compiled Lisp
function in ‘simple.el’.

It is bound to <again>, <redo>, C-x M-:, C-x M-ESC.

(repeat-complex-command ARG)

Edit and re-evaluate last complex command, or ARGth from last.
A complex command is one which used the minibuffer.
The command is placed in the minibuffer as a Lisp form for editing.
The result is executed, repeating the command as changed.
If the command has been changed or is not the most recent previous
command it is added to the front of the command history.
You can use the minibuffer history commands M-n and M-p
to get different commands to edit and resubmit.

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