Clarify docstring of find-feature-regexp

* lisp/emacs-lisp/find-func.el (find-feature-regexp): Explain that `%s'
is optional (Bug #23520).

diff --git a/lisp/emacs-lisp/find-func.el b/lisp/emacs-lisp/find-func.el
index d2e10eab7dce3496cbe27be52ed66e7407062a9e..43bcb420c36f437358dfc9f4f05daa4416b8c9c1 100644 (file)
--- a/lisp/emacs-lisp/find-func.el
+++ b/lisp/emacs-lisp/find-func.el
@@ -103,7 +103,7 @@ Please send improvements and fixes to the maintainer."
 (defcustom find-feature-regexp
   (concat ";;; Code:")
   "The regexp used by `xref-find-definitions' when searching for a feature definition.
-Note it must contain a `%s' at the place where `format'
+Note it may contain up to one `%s' at the place where `format'
 should insert the feature name."
   ;; We search for ";;; Code" rather than (feature '%s) because the
   ;; former is near the start of the code, and the latter is very