Function: ediff-background-face
ediff-background-face is a byte-compiled function defined in
ediff-init.el.gz.
Signature
(ediff-background-face BUF-TYPE DIF-NUM)
Source Code
;; Defined in /usr/src/emacs/lisp/vc/ediff-init.el.gz
(defsubst ediff-background-face (buf-type dif-num)
;; The value of dif-num is always 1- the one that user sees.
;; This is why even face is used when dif-num is odd.
(ediff-get-symbol-from-alist
buf-type (if (cl-oddp dif-num)
ediff-even-diff-face-alist
ediff-odd-diff-face-alist)
))