Variable: ediff--magic-file-name
ediff--magic-file-name is a buffer-local variable defined in
ediff.el.gz.
Documentation
Name of file where buffer's content was saved.
Only non-nil in "magic" buffers such as those of remote files.
Source Code
;; Defined in /usr/src/emacs/lisp/vc/ediff.el.gz
(defvar-local ediff--magic-file-name nil
"Name of file where buffer's content was saved.
Only non-nil in \"magic\" buffers such as those of remote files.")