Fix AST node debug representation to pretty print

Closes GH-51.

Reviewed-by: Titus Wormer <tituswormer@gmail.com>

Author: Mia

src/mdast.rs

@@ -182,40 +182,40 @@ impl fmt::Debug for Node {
     // Debug the wrapped struct.
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            Node::Root(x) => write!(f, "{:?}", x),
-            Node::BlockQuote(x) => write!(f, "{:?}", x),
-            Node::FootnoteDefinition(x) => write!(f, "{:?}", x),
-            Node::MdxJsxFlowElement(x) => write!(f, "{:?}", x),
-            Node::List(x) => write!(f, "{:?}", x),
-            Node::MdxjsEsm(x) => write!(f, "{:?}", x),
-            Node::Toml(x) => write!(f, "{:?}", x),
-            Node::Yaml(x) => write!(f, "{:?}", x),
-            Node::Break(x) => write!(f, "{:?}", x),
-            Node::InlineCode(x) => write!(f, "{:?}", x),
-            Node::InlineMath(x) => write!(f, "{:?}", x),
-            Node::Delete(x) => write!(f, "{:?}", x),
-            Node::Emphasis(x) => write!(f, "{:?}", x),
-            Node::MdxTextExpression(x) => write!(f, "{:?}", x),
-            Node::FootnoteReference(x) => write!(f, "{:?}", x),
-            Node::Html(x) => write!(f, "{:?}", x),
-            Node::Image(x) => write!(f, "{:?}", x),
-            Node::ImageReference(x) => write!(f, "{:?}", x),
-            Node::MdxJsxTextElement(x) => write!(f, "{:?}", x),
-            Node::Link(x) => write!(f, "{:?}", x),
-            Node::LinkReference(x) => write!(f, "{:?}", x),
-            Node::Strong(x) => write!(f, "{:?}", x),
-            Node::Text(x) => write!(f, "{:?}", x),
-            Node::Code(x) => write!(f, "{:?}", x),
-            Node::Math(x) => write!(f, "{:?}", x),
-            Node::MdxFlowExpression(x) => write!(f, "{:?}", x),
-            Node::Heading(x) => write!(f, "{:?}", x),
-            Node::Table(x) => write!(f, "{:?}", x),
-            Node::ThematicBreak(x) => write!(f, "{:?}", x),
-            Node::TableRow(x) => write!(f, "{:?}", x),
-            Node::TableCell(x) => write!(f, "{:?}", x),
-            Node::ListItem(x) => write!(f, "{:?}", x),
-            Node::Definition(x) => write!(f, "{:?}", x),
-            Node::Paragraph(x) => write!(f, "{:?}", x),
+            Node::Root(x) => x.fmt(f),
+            Node::BlockQuote(x) => x.fmt(f),
+            Node::FootnoteDefinition(x) => x.fmt(f),
+            Node::MdxJsxFlowElement(x) => x.fmt(f),
+            Node::List(x) => x.fmt(f),
+            Node::MdxjsEsm(x) => x.fmt(f),
+            Node::Toml(x) => x.fmt(f),
+            Node::Yaml(x) => x.fmt(f),
+            Node::Break(x) => x.fmt(f),
+            Node::InlineCode(x) => x.fmt(f),
+            Node::InlineMath(x) => x.fmt(f),
+            Node::Delete(x) => x.fmt(f),
+            Node::Emphasis(x) => x.fmt(f),
+            Node::MdxTextExpression(x) => x.fmt(f),
+            Node::FootnoteReference(x) => x.fmt(f),
+            Node::Html(x) => x.fmt(f),
+            Node::Image(x) => x.fmt(f),
+            Node::ImageReference(x) => x.fmt(f),
+            Node::MdxJsxTextElement(x) => x.fmt(f),
+            Node::Link(x) => x.fmt(f),
+            Node::LinkReference(x) => x.fmt(f),
+            Node::Strong(x) => x.fmt(f),
+            Node::Text(x) => x.fmt(f),
+            Node::Code(x) => x.fmt(f),
+            Node::Math(x) => x.fmt(f),
+            Node::MdxFlowExpression(x) => x.fmt(f),
+            Node::Heading(x) => x.fmt(f),
+            Node::Table(x) => x.fmt(f),
+            Node::ThematicBreak(x) => x.fmt(f),
+            Node::TableRow(x) => x.fmt(f),
+            Node::TableCell(x) => x.fmt(f),
+            Node::ListItem(x) => x.fmt(f),
+            Node::Definition(x) => x.fmt(f),
+            Node::Paragraph(x) => x.fmt(f),
         }
     }
 }