docs(sidenav): simplify example property binding (#9330)

ni-kit · jelbourn · commit 6be3c64f84bc · 2018-01-25T10:44:13.000-08:00
diff --git a/src/material-examples/sidenav-overview/sidenav-overview-example.html b/src/material-examples/sidenav-overview/sidenav-overview-example.html
@@ -1,5 +1,5 @@
 <mat-sidenav-container class="example-container" *ngIf="shouldRun">
-  <mat-sidenav mode="side" opened="true">Sidenav content</mat-sidenav>
+  <mat-sidenav mode="side" opened>Sidenav content</mat-sidenav>
   <mat-sidenav-content>Main content</mat-sidenav-content>
 </mat-sidenav-container>
 
