Use only block Dartdoc comments in analysis_server.

pkg/analysis_server/test/mocks.dart

Index: pkg/analysis_server/test/mocks.dart
diff --git a/pkg/analysis_server/test/mocks.dart b/pkg/analysis_server/test/mocks.dart
index 8712032b34e1ce684fbe914355ec46f74e7f0ce4..2940115619166587ef346e0661790d39c600cc14 100644
--- a/pkg/analysis_server/test/mocks.dart
+++ b/pkg/analysis_server/test/mocks.dart
@@ -90,7 +90,9 @@ class MockSocket<T> implements WebSocket {
 }
 
 class NoResponseException implements Exception {
-  /// The request that was not responded to.
+  /**
+   * The request that was not responded to.
+   */
   final Request request;
 
   NoResponseException(this.request);
@@ -126,7 +128,9 @@ class MockServerChannel implements ServerCommunicationChannel {
     new Future(() => notificationController.add(notification));
   }
 
-  /// Simulate request/response pair
+  /**
+   * Simulate request/response pair.
+   */
   Future<Response> sendRequest(Request request) {
     var id = request.id;
     // Wrap send request in future to simulate websocket