Partial patch for node formatter

Tests use specific string constants to test the formatting behavior. This uses the .raw original AST node to print child yul ast nodes. This still breaks on the copy test because some fields in InlineAssembly print different types now that YulBlock replaced YulNode and .yul is part of children.

src/ast/ast_node_formatter.ts

@@ -1,4 +1,4 @@
-import { ASTContext, ASTNode } from "./";
+import { ASTContext, ASTNode, YulASTNode, YulASTNodeWithChildren } from "./";
 
 const INDENT = " ".repeat(4);
 const SKIP = new Set(["requiredContext", "raw", "ownChildren"]);
@@ -82,6 +82,9 @@ export class ASTNodeFormatter {
     }
 
     private formatNode(node: ASTNode, level: number, depth: number): string {
+        if (node instanceof YulASTNode || node instanceof YulASTNodeWithChildren) {
+            return this.formatValue(node.raw);
+        }
         const output = [];
         const value = this.formatNodeValue(node);