fix html in markdown

Author: wxiaoguang

modules/markup/html.go

@@ -87,7 +87,7 @@ var globalVars = sync.OnceValue(func() *globalVarsType {
 	v.codePreviewPattern = regexp.MustCompile(`https?://\S+/([^\s/]+)/([^\s/]+)/src/commit/([0-9a-f]{7,64})(/\S+)#(L\d+(-L\d+)?)`)
 
 	// cleans: "<foo/bar", "<any words/", ("<html", "<head", "<script", "<style")
-	v.tagCleaner = regexp.MustCompile(`(?i)<(/?\w+/\w+|/[\w ]+/|/?(html|head|script|style\b))`)
+	v.tagCleaner = regexp.MustCompile(`(?i)<(/?\w+/\w+|/[\w ]+/|/?(html|head|script|style|%|\?)\b)`)
 	v.nulCleaner = strings.NewReplacer("\000", "")
 	return v
 })

modules/markup/html_test.go

@@ -525,6 +525,10 @@ func TestPostProcess(t *testing.T) {
 	test("<script>a</script>", `&lt;script&gt;a&lt;/script&gt;`)
 	test("<STYLE>a", `&lt;STYLE&gt;a`)
 	test("<style>a</STYLE>", `&lt;style&gt;a&lt;/STYLE&gt;`)
+
+	// other special tags, our special behavior
+	test("<?php\nfoo", "&lt;?php\nfoo")
+	test("<%asp\nfoo", "&lt;%asp\nfoo")
 }
 
 func TestIssue16020(t *testing.T) {