Avoid adding colon for track in 3rd expression of for blocks (#15887)

tests/format/angular/control-flow/__snapshots__/jsfmt.spec.js.snap

@@ -285,6 +285,12 @@ item of
   <div *ngFor="item of items; track item"></div>
 </div>
 
+<div>
+  @for (item of items; let i = $index; track block) {}
+
+  <div *ngFor="item of items; let i = $index; track block"></div>
+</div>
+
 =====================================output=====================================
 <ul>
   @for (let item of items; index as i; trackBy: trackByFn) {
@@ -332,6 +338,12 @@ item of
   <div *ngFor="item of items; track item"></div>
 </div>
 
+<div>
+  @for (item of items; let i = $index; track block) {}
+
+  <div *ngFor="item of items; let i = $index; track block"></div>
+</div>
+
 ================================================================================
 `;
 

tests/format/angular/control-flow/for.html

@@ -52,3 +52,9 @@ item of
 
   <div *ngFor="item of items; track item"></div>
 </div>
+
+<div>
+  @for (item of items; let i = $index; track block) {}
+
+  <div *ngFor="item of items; let i = $index; track block"></div>
+</div>