Regenerate all stuff.

grpc/discovery/internal/testservices/helloworld.pb.go

Index: grpc/discovery/internal/testservices/helloworld.pb.go
diff --git a/grpc/discovery/internal/testservices/helloworld.pb.go b/grpc/discovery/internal/testservices/helloworld.pb.go
index bb0d369ce0e2f0454e4f1edaa1411ecd58f0c34d..38281c2bc09e86af1a38a632d75a4e735bca67f9 100644
--- a/grpc/discovery/internal/testservices/helloworld.pb.go
+++ b/grpc/discovery/internal/testservices/helloworld.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: github.com/luci/luci-go/grpc/discovery/internal/testservices/helloworld.proto
-// DO NOT EDIT!
 
 /*
 Package testservices is a generated protocol buffer package.
@@ -295,7 +294,7 @@ func init() {
 
 var fileDescriptor0 = []byte{
 	// 263 bytes of a gzipped FileDescriptorProto
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+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x74, 0x90, 0xd1, 0x4a, 0xc3, 0x30,
 	0x14, 0x86, 0x57, 0x99, 0x6e, 0x1e, 0x0a, 0x4a, 0xae, 0x4a, 0x41, 0x19, 0xb9, 0x10, 0x6f, 0xd6,
 	0xc0, 0x7c, 0x03, 0xbd, 0x50, 0x90, 0xde, 0x74, 0x4f, 0xd0, 0x65, 0x87, 0x2e, 0x70, 0xda, 0xc4,
 	0x24, 0x9d, 0xcb, 0x9e, 0x5e, 0xda, 0x59, 0xac, 0xe2, 0x6e, 0x42, 0x7e, 0xfe, 0x8f, 0xe4, 0x3b,