Shell History Copying
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`C-c C-p'
Move point to the previous prompt (`comint-previous-prompt').
`C-c C-n'
Move point to the following prompt (`comint-next-prompt').
`C-c <RET>'
Copy the input command which point is in, inserting the copy at
the end of the buffer (`comint-copy-old-input'). This is useful
if you move point back to a previous command. After you copy the
command, you can submit the copy as input with <RET>. If you
wish, you can edit the copy before resubmitting it.
Moving to a previous input and then copying it with `C-c <RET>'
produces the same results--the same buffer contents--that you would get
by using `M-p' enough times to fetch that previous input from the
history list. However, `C-c <RET>' copies the text from the buffer,
which can be different from what is in the history list if you edit the
input text in the buffer after it has been sent.