multi-isearch-files
multi-isearch-files is an interactive autoloaded compiled Lisp function in `misearch.el
'.
(multi-isearch-files FILES)
Start multi-buffer Isearch on a list of FILES.
Relative file names in this list are expanded to absolute
file names using the current buffer's value of `default-directory'.
Interactively read file names to search, one by one, ended with RET.
With a prefix argument, ask for a wildcard, and search in file buffers
whose file names match the specified wildcard.