enhance(markup): improve issue title rendering (#37908)

modules/markup/html_emoji.go

@@ -69,6 +69,11 @@ func emojiShortCodeProcessor(ctx *RenderContext, node *html.Node) {
 		m[1] += start
 		start = m[1]
 
+		// don't render a shortcode whose ":" directly follows a backtick (an unclosed code span)
+		if m[0] > 0 && node.Data[m[0]-1] == '`' {
+			continue
+		}
+
 		alias := node.Data[m[0]:m[1]]
 
 		var nextChar byte

modules/markup/html_test.go

@@ -377,6 +377,9 @@ func TestRender_emoji(t *testing.T) {
 	test(":100:200", `<p>:100:200</p>`)
 	test("std::thread::something", `<p>std::thread::something</p>`)
 	test(":not exist:", `<p>:not exist:</p>`)
+	test("foo `:smile:", "<p>foo `:smile:</p>")
+	test("foo `:smile:`", `<p>foo <code>:smile:</code></p>`)
+	test("foo ` :smile:", "<p>foo ` <span class=\"emoji\" aria-label=\"grinning face with smiling eyes\">😄</span></p>")
 }
 
 func TestRender_ShortLinks(t *testing.T) {