docs(Location): updating Location docs and adding example

closes #11500

modules/@angular/examples/common/location/ts/path_location_component.ts

@@ -0,0 +1,26 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+// #docregion LocationComponent
+import {Location, LocationStrategy, PathLocationStrategy} from '@angular/common';
+import {Component} from '@angular/core';
+
+@Component({
+  selector: 'path-location',
+  providers: [Location, {provide: LocationStrategy, useClass: PathLocationStrategy}],
+  template: `
+    <h1>PathLocationStrategy</h1>
+    Current URL is: <code>{{location.path()}}</code><br>
+    Normalize: <code>/foo/bar/</code> is: <code>{{location.normalize('foo/bar')}}</code><br>
+  `
+})
+export class PathLocationComponent {
+  location: Location;
+  constructor(location: Location) { this.location = location; }
+}
+// #enddocregion