** The package misearch.el has been added. It allows Isearch to search
through multiple buffers. A variable `multi-isearch-next-buffer-function'
defines the function to call to get the next buffer to search in the series
-of multiple buffers. Top-level commands `multi-isearch-buffers',
+of multiple buffers. Top-level functions `multi-isearch-buffers',
`multi-isearch-buffers-regexp', `multi-isearch-files' and
`multi-isearch-files-regexp' accept a single argument that specifies
a list of buffers/files to search for a string/regexp.