From: Stephen Berman <Stephen.Berman@gmx.net>
Date: Mon, 2 Nov 2020 22:24:20 +0000 (+0100)
Subject: Don't render XML declaration of an HTML document (bug#44348)
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Don't render XML declaration of an HTML document (bug#44348)

* lisp/net/eww.el (eww--preprocess-html): Prevent converting the
left angle bracket in the sequence "<?" to an HTML entity.
---

diff --git a/lisp/net/eww.el b/lisp/net/eww.el
index 449618bd672..d6f850ca3ba 100644
--- a/lisp/net/eww.el
+++ b/lisp/net/eww.el
@@ -345,7 +345,7 @@ the default EWW buffer."
       (narrow-to-region start end)
       (goto-char start)
       (let ((case-fold-search t))
-        (while (re-search-forward "<[^0-9a-z!/]" nil t)
+        (while (re-search-forward "<[^0-9a-z!?/]" nil t)
           (goto-char (match-beginning 0))
           (delete-region (point) (1+ (point)))
           (insert "&lt;"))))))