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(elisp)Kill Ring Concepts

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Kill Ring Concepts
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   The kill ring records killed text as strings in a list, most recent
first.  A short kill ring, for example, might look like this:

     ("some text" "a different piece of text" "even older text")

When the list reaches `kill-ring-max' entries in length, adding a new
entry automatically deletes the last entry.

   When kill commands are interwoven with other commands, each kill
command makes a new entry in the kill ring.  Multiple kill commands in
succession build up a single kill-ring entry, which would be yanked as a
unit; the second and subsequent consecutive kill commands add text to
the entry made by the first one.

   For yanking, one entry in the kill ring is designated the "front" of
the ring.  Some yank commands "rotate" the ring by designating a
different element as the "front."  But this virtual rotation doesn't
change the list itself--the most recent entry always comes first in the
list.