cmd/cloner: mangle "go:generate" in cloner.go

The "go generate" command blindly looks for "//go:generate" anywhere
in the file regardless of whether it is truly a comment.
Prevent this false positive in cloner.go by mangling the string
to look less like "//go:generate".

Signed-off-by: Joe Tsai <joetsai@digital-static.net>

cmd/cloner/cloner.go

@@ -131,7 +131,7 @@ const header = `// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserve
 // license that can be found in the LICENSE file.
 
 // Code generated by tailscale.com/cmd/cloner; DO NOT EDIT.
-//go:generate go run tailscale.com/cmd/cloner %s
+//` + `go:generate` + ` go run tailscale.com/cmd/cloner %s
 
 package %s
 

ipn/prefs_clone.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by the following command; DO NOT EDIT.
-//   tailscale.com/cmd/cloner -type Prefs
+// Code generated by tailscale.com/cmd/cloner; DO NOT EDIT.
+//go:generate go run tailscale.com/cmd/cloner -type=Prefs -output=prefs_clone.go
 
 package ipn
 

net/dnsfallback/dns-fallback-servers.json

@@ -41,11 +41,11 @@
 			"RegionName": "r11",
 			"Nodes": [
 				{
-					"Name": "11b",
+					"Name": "11a",
 					"RegionID": 11,
-					"HostName": "derp11b.tailscale.com",
-					"IPv4": "15.228.50.175",
-					"IPv6": "2600:1f1e:26e:2f01:fca6:2392:ea86:c768"
+					"HostName": "derp11.tailscale.com",
+					"IPv4": "18.230.97.74",
+					"IPv6": "2600:1f1e:ee4:5611:ec5c:1736:d43b:a454"
 				}
 			]
 		},

tailcfg/tailcfg_clone.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by the following command; DO NOT EDIT.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
+// Code generated by tailscale.com/cmd/cloner; DO NOT EDIT.
+//go:generate go run tailscale.com/cmd/cloner -type=User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode -output=tailcfg_clone.go -clonefunc
 
 package tailcfg
 

types/dnstype/dnstype_clone.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by the following command; DO NOT EDIT.
-//   tailscale.com/cmd/cloner -type Resolver
+// Code generated by tailscale.com/cmd/cloner; DO NOT EDIT.
+//go:generate go run tailscale.com/cmd/cloner -type=Resolver -output=dnstype_clone.go -clonefunc
 
 package dnstype
 

types/persist/persist_clone.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by the following command; DO NOT EDIT.
-//   tailscale.com/cmd/cloner -type Persist
+// Code generated by tailscale.com/cmd/cloner; DO NOT EDIT.
+//go:generate go run tailscale.com/cmd/cloner -type=Persist -output=persist_clone.go
 
 package persist
 

wgengine/filter/match_clone.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by the following command; DO NOT EDIT.
-//   tailscale.com/cmd/cloner -type Match
+// Code generated by tailscale.com/cmd/cloner; DO NOT EDIT.
+//go:generate go run tailscale.com/cmd/cloner -type=Match -output=match_clone.go
 
 package filter
 

wgengine/wgcfg/clone.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by the following command; DO NOT EDIT.
-//   tailscale.com/cmd/cloner -type Config,Peer
+// Code generated by tailscale.com/cmd/cloner; DO NOT EDIT.
+//go:generate go run tailscale.com/cmd/cloner -type=Config,Peer -output=clone.go
 
 package wgcfg