fix(module:tabs): nzLinkRouter not work for the first time (#9118)

Author: Laffery

components/tabs/tab.component.ts

@@ -43,7 +43,9 @@ export const NZ_TAB_SET = new InjectionToken<NzSafeAny>('NZ_TAB_SET');
     <ng-template #tabLinkTemplate>
       <ng-content select="[nz-tab-link]"></ng-content>
     </ng-template>
-    <ng-template #contentTemplate><ng-content></ng-content></ng-template>
+    <ng-template #contentTemplate>
+      <ng-content></ng-content>
+    </ng-template>
   `
 })
 export class NzTabComponent implements OnChanges, OnDestroy {

components/tabs/tabset.component.ts

@@ -483,14 +483,8 @@ export class NzTabSetComponent implements OnInit, AfterContentChecked, OnDestroy
       if (!this.router) {
         throw new Error(`${PREFIX} you should import 'RouterModule' if you want to use 'nzLinkRouter'!`);
       }
-      merge(
-        this.router.events.pipe(
-          filter(e => e instanceof NavigationEnd),
-          delay(0)
-        ),
-        this.tabLinks.changes
-      )
-        .pipe(takeUntil(this.destroy$), startWith(true))
+      merge(this.router.events.pipe(filter(e => e instanceof NavigationEnd)), this.tabLinks.changes)
+        .pipe(delay(0), takeUntil(this.destroy$))
         .subscribe(() => {
           this.updateRouterActive();
           this.cdr.markForCheck();