change-log-next-buffer is a compiled Lisp function in `add-log.el'.

(change-log-next-buffer &optional BUFFER WRAP)

Return the next buffer in the series of ChangeLog file buffers.
This function is used for multiple buffers isearch.
A sequence of buffers is formed by ChangeLog files with decreasing
numeric file name suffixes in the directory of the initial ChangeLog
file were isearch was started.