build: fix lint error

src/components-examples/material/sidenav/sidenav-drawer-overview/sidenav-drawer-overview-example.css

@@ -3,6 +3,7 @@
   height: 200px;
   margin: 10px;
   border: 1px solid #555;
-  /* The background property is added to clearly distinguish the borders between drawer and main content */
+  /* The background property is added to clearly distinguish the borders between drawer and main
+     content */
   background: #eee;
 }