Add a face to \\= doc string escapes

* lisp/emacs-lisp/lisp-mode.el (lisp-fdefs): Add a face to \\= doc
string escapes (bug#55783).

diff --git a/lisp/emacs-lisp/lisp-mode.el b/lisp/emacs-lisp/lisp-mode.el
index 0492f25dc9d54d1cab44f328eb453878ed38640c..c2d0efbf50d89ee704db7886f17c6d6982950d4a 100644 (file)
--- a/lisp/emacs-lisp/lisp-mode.el
+++ b/lisp/emacs-lisp/lisp-mode.el
@@ -485,6 +485,9 @@ This will generate compile-time constants from BINDINGS."
          ;; Words inside ‘’, '' and `' tend to be symbol names.
          (,(concat "[`‘']\\(" lisp-mode-symbol-regexp "\\)['’]")
           (1 font-lock-constant-face prepend))
+         ;; \\= tends to be an escape in doc strings.
+         ("\\\\\\\\="
+          (0 font-lock-builtin-face prepend))
          ;; Constant values.
          (,(concat "\\_<:" lisp-mode-symbol-regexp "\\_>")
           (0 font-lock-builtin-face))