[BUG] ox-texinfo can't export example blocks [9.6.9 (release_9.6.9 @ /usr/local/share/emacs/30.0.50/lisp/org/)]

[pva-outdoor@yandex.ru]

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Hello, Team!

It seems that in ox-texinfo.el the `string-match-p' is used instead of
`string-equal' (here is my patch):

--- /usr/local/share/emacs/30.0.50/lisp/org/ox-texinfo.el.gz
+++ #<buffer ox-texinfo.el.gz>
@@ -1680,7 +1680,7 @@
   "Transcode a SRC-BLOCK element from Org to Texinfo.
 CONTENTS holds the contents of the item.  INFO is a plist holding
 contextual information."
-  (let* ((lisp (string-match-p "lisp"
+  (let* ((lisp (string-equal "lisp"
 			       (org-element-property :language src-block)))
 	 (code (org-texinfo--sanitize-content
 		(org-export-format-code-default src-block info)))

Without this fix I can't export my `.org' files to `.texi' format as the
:language property is nil for #+BEGIN_EXAMPLE ... #+END_EXAMPLE blocks.


Emacs  : GNU Emacs 30.0.50 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.38, cairo version 1.18.0)
 of 2023-10-05
Package: Org mode version 9.6.9 (release_9.6.9 @ /usr/local/share/emacs/30.0.50/lisp/org/)
-- 
С уважением,
Андрей Петров.