Issue #26736: Used HTTPS for external links in the documentation if possible.
diff --git a/Doc/library/htmllib.rst b/Doc/library/htmllib.rst
index e5045dd..08ac577 100644
--- a/Doc/library/htmllib.rst
+++ b/Doc/library/htmllib.rst
@@ -64,7 +64,7 @@
.. class:: HTMLParser(formatter)
This is the basic HTML parser class. It supports all entity names required by
- the XHTML 1.0 Recommendation (http://www.w3.org/TR/xhtml1). It also defines
+ the XHTML 1.0 Recommendation (https://www.w3.org/TR/xhtml1). It also defines
handlers for all HTML 2.0 and many HTML 3.0 and 3.2 elements.