More TS 7 fixes (#1347)

Author: jakebailey

.changeset/hot-peaches-beam.md

@@ -0,0 +1,5 @@
+---
+
+---
+
+

packages/dtslint/src/lintCorsa.ts

@@ -336,6 +336,11 @@ function normalizedCorsaTypeToString(
   }
   function visit(node: Node): Node {
     node = astModule.visitEachChild(node, visit);
+    if (astModule.isLiteralTypeNode(node) && astModule.isStringLiteral(node.literal)) {
+      return factoryModule.createLiteralTypeNode(
+        factoryModule.createStringLiteral(node.literal.text, astModule.TokenFlags.None),
+      );
+    }
     if (astModule.isUnionTypeNode(node)) {
       const types = node.types
         .map((item) => [item, print(item)] as const)

packages/dtslint/test/fixtures/corsa/pass/test.ts

@@ -13,6 +13,12 @@ object; // $ExpectType { a: number; b: string; }
 declare const indexedObject: { [key: string]: unknown; b: string; a: number };
 indexedObject; // $ExpectType { [key: string]: unknown; a: number; b: string; }
 
+declare const quotedUnion: "b" | "a";
+quotedUnion; // $ExpectType 'a' | 'b'
+
+declare const quotedObject: { value: "x" };
+quotedObject; // $ExpectType { value: 'x' }
+
 declare const overloaded: {
   (value: string): string;
   (value: number): number;