Fix markdown frontmatter rendering (#34102)

Fix #34101

modules/markup/markdown/ast.go

@@ -4,6 +4,7 @@
 package markdown
 
 import (
+	"html/template"
 	"strconv"
 
 	"github.com/yuin/goldmark/ast"
@@ -29,9 +30,7 @@ func (n *Details) Kind() ast.NodeKind {
 
 // NewDetails returns a new Paragraph node.
 func NewDetails() *Details {
-	return &Details{
-		BaseBlock: ast.BaseBlock{},
-	}
+	return &Details{}
 }
 
 // Summary is a block that contains the summary of details block
@@ -54,9 +53,7 @@ func (n *Summary) Kind() ast.NodeKind {
 
 // NewSummary returns a new Summary node.
 func NewSummary() *Summary {
-	return &Summary{
-		BaseBlock: ast.BaseBlock{},
-	}
+	return &Summary{}
 }
 
 // TaskCheckBoxListItem is a block that represents a list item of a markdown block with a checkbox
@@ -95,29 +92,6 @@ type Icon struct {
 	Name []byte
 }
 
-// Dump implements Node.Dump .
-func (n *Icon) Dump(source []byte, level int) {
-	m := map[string]string{}
-	m["Name"] = string(n.Name)
-	ast.DumpHelper(n, source, level, m, nil)
-}
-
-// KindIcon is the NodeKind for Icon
-var KindIcon = ast.NewNodeKind("Icon")
-
-// Kind implements Node.Kind.
-func (n *Icon) Kind() ast.NodeKind {
-	return KindIcon
-}
-
-// NewIcon returns a new Paragraph node.
-func NewIcon(name string) *Icon {
-	return &Icon{
-		BaseInline: ast.BaseInline{},
-		Name:       []byte(name),
-	}
-}
-
 // ColorPreview is an inline for a color preview
 type ColorPreview struct {
 	ast.BaseInline
@@ -175,3 +149,24 @@ func NewAttention(attentionType string) *Attention {
 		AttentionType: attentionType,
 	}
 }
+
+var KindRawHTML = ast.NewNodeKind("RawHTML")
+
+type RawHTML struct {
+	ast.BaseBlock
+	rawHTML template.HTML
+}
+
+func (n *RawHTML) Dump(source []byte, level int) {
+	m := map[string]string{}
+	m["RawHTML"] = string(n.rawHTML)
+	ast.DumpHelper(n, source, level, m, nil)
+}
+
+func (n *RawHTML) Kind() ast.NodeKind {
+	return KindRawHTML
+}
+
+func NewRawHTML(rawHTML template.HTML) *RawHTML {
+	return &RawHTML{rawHTML: rawHTML}
+}