Create an indirect buffer that is a twin copy of the current buffer.
Give the indirect buffer name NEWNAME. Interactively, read NEWNAME
from the minibuffer when invoked with a prefix arg. If NEWNAME is nil
or if not called with a prefix arg, NEWNAME defaults to the current
buffer's name. The name is modified by adding a `
or by incrementing the N in an existing suffix. Trying to clone a
buffer whose major mode symbol has a non-nil `no-clone-indirect'
property results in an error.
DISPLAY-FLAG non-nil means show the new buffer with `pop-to-buffer'.
This is always done when called interactively.
Optional third arg NORECORD non-nil means do not put this buffer at the front of the list of recently selected ones.