Fix fmt error

Signed-off-by: Bin Shi <binshi.bing@gmail.com>

server/grpc_service.go

@@ -1507,21 +1507,21 @@ func (s *GrpcServer) GetGCSafePointV2(_ context.Context, _ *pdpb.GetGCSafePointV
 	return nil, errors.New("not implemented")
 }
 
-// GetGCSafePointV2 implements gRPC PDServer.
+// WatchGCSafePointV2 implements gRPC PDServer.
 // Note: we need latest version of kvproto/master, but there was earlier commit https://github.com/pingcap/kvproto/pull/1111
 // whose server side implementation hasn't been merged, so we add this method to avoid compile error.
 func (s *GrpcServer) WatchGCSafePointV2(_ *pdpb.WatchGCSafePointV2Request, server pdpb.PD_WatchGCSafePointV2Server) error {
 	return errors.New("not implemented")
 }
 
-// GetGCSafePointV2 implements gRPC PDServer.
+// UpdateGCSafePointV2 implements gRPC PDServer.
 // Note: we need latest version of kvproto/master, but there was earlier commit https://github.com/pingcap/kvproto/pull/1111
 // whose server side implementation hasn't been merged, so we add this method to avoid compile error.
 func (s *GrpcServer) UpdateGCSafePointV2(_ context.Context, _ *pdpb.UpdateGCSafePointV2Request) (*pdpb.UpdateGCSafePointV2Response, error) {
 	return nil, errors.New("not implemented")
 }
 
-// GetGCSafePointV2 implements gRPC PDServer.
+// UpdateServiceSafePointV2 implements gRPC PDServer.
 // Note: we need latest version of kvproto/master, but there was earlier commit https://github.com/pingcap/kvproto/pull/1111
 // whose server side implementation hasn't been merged, so we add this method to avoid compile error.
 func (s *GrpcServer) UpdateServiceSafePointV2(_ context.Context, _ *pdpb.UpdateServiceSafePointV2Request) (*pdpb.UpdateServiceSafePointV2Response, error) {