eintr: copy-region-as-kill
8.3 ‘copy-region-as-kill’
=========================
The ‘copy-region-as-kill’ function copies a region of text from a buffer
and (via either ‘kill-append’ or ‘kill-new’) saves it in the
‘kill-ring’.
If you call ‘copy-region-as-kill’ immediately after a ‘kill-region’
command, Emacs appends the newly copied text to the previously copied
text. This means that if you yank back the text, you get it all, from
both this and the previous operation. On the other hand, if some other
command precedes the ‘copy-region-as-kill’, the function copies the text
into a separate entry in the kill ring.
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