fix(js): ensure typescript-sync generator produces formatted references when no prettier is installed (#29368)

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Fixes #

Author: leosvelperez

packages/js/src/generators/typescript-sync/typescript-sync.spec.ts

@@ -14,6 +14,7 @@ let projectGraph: ProjectGraph;
 jest.mock('@nx/devkit', () => ({
   ...jest.requireActual('@nx/devkit'),
   createProjectGraphAsync: jest.fn(() => Promise.resolve(projectGraph)),
+  formatFiles: jest.fn(() => Promise.resolve()),
 }));
 
 describe('syncGenerator()', () => {
@@ -562,11 +563,11 @@ describe('syncGenerator()', () => {
   "compilerOptions": {
     "composite": true,
     // This is a nested comment
-    "target": "es5",
+    "target": "es5"
   },
   "references": []
 }
-      `
+`
       );
 
       await syncGenerator(tree);

packages/js/src/generators/typescript-sync/typescript-sync.ts

@@ -604,7 +604,7 @@ function patchTsconfigJsonReferences(
     stringifiedJsonContents,
     ['references'],
     updatedReferences,
-    { formattingOptions: { keepLines: false } }
+    { formattingOptions: { keepLines: true, insertSpaces: true, tabSize: 2 } }
   );
   const updatedJsonContents = applyEdits(stringifiedJsonContents, edits);
   // The final contents will be formatted by formatFiles() later