Backport: Fix typo in regexp-opt example code

* doc/lispref/searching.texi (Regexp Functions):
Fix typo in example code (Bug#34596).

diff --git a/doc/lispref/searching.texi b/doc/lispref/searching.texi
index 2e951d0d5d77d12daaaee84d8a23bc5ddc0f9d78..b182fae5955a5957c1f072b507b560c06c40cd81 100644 (file)
--- a/doc/lispref/searching.texi
+++ b/doc/lispref/searching.texi
@@ -1013,9 +1013,9 @@ more efficient than that of a simplified version:
          ((eq paren 'symbols) '("\\_<\\(" . "\\)\\_>"))
          ((null paren)          '("\\(?:" . "\\)"))
          (t                       '("\\(" . "\\)")))))
-   (concat (car paren)
+   (concat (car parens)
            (mapconcat 'regexp-quote strings "\\|")
-           (cdr paren))))
+           (cdr parens))))
 @end example
 @end defun