docs(ngCsp): fix "directive"'s `restrict` and hide comment from output

src/ng/directive/ngCsp.js

@@ -4,7 +4,8 @@
  * @ngdoc directive
  * @name ngCsp
  *
- * @element html
+ * @restrict A
+ * @element ANY
  * @description
  *
  * Angular has some features that can conflict with certain restrictions that are applied when using
@@ -86,8 +87,7 @@
      </html>
    ```
   * @example
-      // Note: the suffix `.csp` in the example name triggers
-      // csp mode in our http server!
+      <!-- Note: the `.csp` suffix in the example name triggers CSP mode in our http server! -->
       <example name="example.csp" module="cspExample" ng-csp="true">
         <file name="index.html">
           <div ng-controller="MainController as ctrl">
@@ -204,6 +204,6 @@
       </example>
   */
 
-// ngCsp is not implemented as a proper directive any more, because we need it be processed while we
-// bootstrap the system (before $parse is instantiated), for this reason we just have
-// the csp() fn that looks for the `ng-csp` attribute anywhere in the current doc
+// `ngCsp` is not implemented as a proper directive any more, because we need it be processed while
+// we bootstrap the app (before `$parse` is instantiated). For this reason, we just have the `csp()`
+// fn that looks for the `ng-csp` attribute anywhere in the current doc.