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Programming in Emacs Lisp

4.4 The Definition of append-to-buffer

The append-to-buffer command is very nearly as simple as the mark-whole-buffer command. What it does is copy the region (that is, the part of the buffer between point and mark) from the current buffer to a specified buffer.

An Overview of append-to-buffer
4.4.1 The append-to-buffer Interactive Expression		A two part interactive expression.
4.4.2 The Body of append-to-buffer		Incorporates a let expression.
4.4.3 save-excursion in append-to-buffer		How the save-excursion works.