bug#65799: 29.1.50; Typo in elisp manual

[Sebastian Miele]

In GNU Emacs 29.1.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.38, cairo version 1.17.8) of 2023-09-06 built on huette
Repository revision: 9e9f61866e7dab6f805fac0e2fb03e786e32f6b3

diff --git a/doc/lispref/strings.texi b/doc/lispref/strings.texi
index 3d86a87516b..7d11db49def 100644
--- a/doc/lispref/strings.texi
+++ b/doc/lispref/strings.texi
@@ -754,7 +754,7 @@ Text Comparison
 @defun string-search needle haystack &optional start-pos
 Return the position of the first instance of @var{needle} in
 @var{haystack}, both of which are strings.  If @var{start-pos} is
-non-@code{nil}, start searching from that position in @var{needle}.
+non-@code{nil}, start searching from that position in @var{haystack}.
 Return @code{nil} if no match was found.
 This function only considers the characters in the strings when doing
 the comparison; text properties are ignored.  Matching is always