Regenerate all stuff.

common/proto/google/descutil/util_test.pb_test.go

Index: common/proto/google/descutil/util_test.pb_test.go
diff --git a/common/proto/google/descutil/util_test.pb_test.go b/common/proto/google/descutil/util_test.pb_test.go
index db9d5ab20fb3dac45bcd1bc996e39873812f5e85..d891fcd67a00e06b01940737148bdf9fa9a227f8 100644
--- a/common/proto/google/descutil/util_test.pb_test.go
+++ b/common/proto/google/descutil/util_test.pb_test.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/common/proto/google/descutil/util_test.proto
-// DO NOT EDIT!
 
 /*
 Package descutil is a generated protocol buffer package.
@@ -613,7 +612,7 @@ func init() {
 
 var fileDescriptor0 = []byte{
 	// 312 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x8c, 0x91, 0xcb, 0x4b, 0xf3, 0x40,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x91, 0xcb, 0x4b, 0xf3, 0x40,
 	0x14, 0xc5, 0x9b, 0xdb, 0x07, 0xdf, 0x77, 0xd5, 0x12, 0xc6, 0x2e, 0x86, 0xd2, 0x45, 0x99, 0x55,
 	0x10, 0xcc, 0x38, 0xd3, 0xc7, 0x5a, 0xc4, 0x82, 0x0b, 0xa3, 0x92, 0x82, 0x5b, 0x69, 0xd3, 0x49,
 	0x2c, 0x34, 0x1d, 0x69, 0x26, 0xe0, 0x9f, 0x2f, 0xb9, 0x7d, 0xd8, 0xba, 0x10, 0x37, 0x37, 0xdc,