Review hypertext: Use placeholder element for icons

app/utils/minetest_hypertext.py

@@ -328,9 +328,9 @@ def make_link(url: str, label: str):
 		content = html_to_minetest(html, package.get_url("packages.view", absolute=True),
 				formspec_version, False, f"review_{review.id}_")["body"].strip()
 		author = make_link(abs_url_for("users.profile", username=review.author.username), review.author.display_name)
-		rating = ["👎", "👎", "-", "👍", "👍"][review.rating - 1]
+		rating = ["<thumbsup>", "<thumbsup>", "<neutral>", "<thumbsup>", "<thumbsup>"][review.rating - 1]
 		comments = make_link(abs_url_for("threads.view", id=review.thread.id), "Comments")
-		body += f"{author} {review.rating}\n<big>{escape_hypertext(review.thread.title)}</big>\n{content}\n{comments}\n\n"
+		body += f"{author} {rating}\n<big>{escape_hypertext(review.thread.title)}</big>\n{content}\n{comments}\n\n"
 
 	return {
 		"head": HEAD,