; Use HTML entities for reserved characters in 'dom-print'

* lisp/dom.el (dom-print): Encode HTML reserved characters in strings.
* test/lisp/dom-tests.el (dom-tests-print): New test.  (Bug#68508)

lisp/dom.el

@@ -288,7 +288,7 @@ If XML, generate XML instead of HTML."
 	(insert ">")
         (dolist (child children)
 	  (if (stringp child)
-	      (insert child)
+	      (insert (url-insert-entities-in-string child))
 	    (setq non-text t)
 	    (when pretty
               (insert "\n" (make-string (+ column 2) ?\s)))

test/lisp/dom-tests.el

@@ -209,6 +209,16 @@ child results in an error."
       (dom-pp node t)
       (should (equal (buffer-string) "(\"foo\" nil)")))))
 
+(ert-deftest dom-tests-print ()
+  "Test that `dom-print' correctly encodes HTML reserved characters."
+  (with-temp-buffer
+    (dom-print '(samp ((class . "samp")) "<div class=\"default\"> </div>"))
+    (should (equal
+             (buffer-string)
+             (concat "<samp class=\"samp\">"
+                     "&lt;div class=&quot;default&quot;&gt; &lt;/div&gt;"
+                     "</samp>")))))
+
 (ert-deftest dom-test-search ()
   (let ((dom '(a nil (b nil (c nil)))))
     (should (equal (dom-search dom (lambda (d) (eq (dom-tag d) 'a)))