all: make copyright headers consistent with one space after period

Go policy has been single space after periods in comments for some time.

The copyright header template at:

	https://golang.org/doc/contribute.html#copyright

also uses a single space.

Make them all consistent.

This CL was generated with:

	perl -i -npe 's,^(// Copyright [0-9]+ The Go Authors\.)  (All rights reserved\.)$,$1 $2,' $(git grep -l -E '^// Copyright [0-9]+ The Go Authors\.  All rights reserved\.$')

Follows https://golang.org/cl/20111.

Change-Id: I66671dddf821f5dc027bc254e0196b3e3a2bdf3b
Reviewed-on: https://go-review.googlesource.com/32878
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/dict/dict.go b/dict/dict.go
index 58fef89..93e65c0 100644
--- a/dict/dict.go
+++ b/dict/dict.go
@@ -1,4 +1,4 @@
-// Copyright 2010 The Go Authors.  All rights reserved.
+// Copyright 2010 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/icmp/echo.go b/icmp/echo.go
index dd55181..e6f15ef 100644
--- a/icmp/echo.go
+++ b/icmp/echo.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/icmp/ipv6.go b/icmp/ipv6.go
index 58eaa77..2e8cfeb 100644
--- a/icmp/ipv6.go
+++ b/icmp/ipv6.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/icmp/message.go b/icmp/message.go
index 42d6df2..ea01bba 100644
--- a/icmp/message.go
+++ b/icmp/message.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/icmp/messagebody.go b/icmp/messagebody.go
index 2121a17..2463730 100644
--- a/icmp/messagebody.go
+++ b/icmp/messagebody.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/internal/iana/gen.go b/internal/iana/gen.go
index 2d8c07c..86c78b3 100644
--- a/internal/iana/gen.go
+++ b/internal/iana/gen.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/internal/nettest/interface.go b/internal/nettest/interface.go
index 53ae13a..8e6333a 100644
--- a/internal/nettest/interface.go
+++ b/internal/nettest/interface.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/control.go b/ipv4/control.go
index 8cadfd7..da4da2d 100644
--- a/ipv4/control.go
+++ b/ipv4/control.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/control_bsd.go b/ipv4/control_bsd.go
index 33d8bc8..3f27f99 100644
--- a/ipv4/control_bsd.go
+++ b/ipv4/control_bsd.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/control_stub.go b/ipv4/control_stub.go
index 88602c3..27e618b 100644
--- a/ipv4/control_stub.go
+++ b/ipv4/control_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/control_unix.go b/ipv4/control_unix.go
index 211f4b4..25ef661 100644
--- a/ipv4/control_unix.go
+++ b/ipv4/control_unix.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/control_windows.go b/ipv4/control_windows.go
index 49a113b..b27407d 100644
--- a/ipv4/control_windows.go
+++ b/ipv4/control_windows.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/dgramopt_posix.go b/ipv4/dgramopt_posix.go
index 693c137..fbc5df1 100644
--- a/ipv4/dgramopt_posix.go
+++ b/ipv4/dgramopt_posix.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/dgramopt_stub.go b/ipv4/dgramopt_stub.go
index 53cf1c6..f6b867f 100644
--- a/ipv4/dgramopt_stub.go
+++ b/ipv4/dgramopt_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/doc.go b/ipv4/doc.go
index d58a4c9..7b25ea2 100644
--- a/ipv4/doc.go
+++ b/ipv4/doc.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/endpoint.go b/ipv4/endpoint.go
index a8ca2ff..dc7557b 100644
--- a/ipv4/endpoint.go
+++ b/ipv4/endpoint.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/example_test.go b/ipv4/example_test.go
index 4f5e2f3..ddc7577 100644
--- a/ipv4/example_test.go
+++ b/ipv4/example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/gen.go b/ipv4/gen.go
index 187d648..ffb44fe 100644
--- a/ipv4/gen.go
+++ b/ipv4/gen.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/genericopt_posix.go b/ipv4/genericopt_posix.go
index f333581..58168b7 100644
--- a/ipv4/genericopt_posix.go
+++ b/ipv4/genericopt_posix.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/genericopt_stub.go b/ipv4/genericopt_stub.go
index f907189..661a4d1 100644
--- a/ipv4/genericopt_stub.go
+++ b/ipv4/genericopt_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/header.go b/ipv4/header.go
index f31be59..6dc26d4 100644
--- a/ipv4/header.go
+++ b/ipv4/header.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/header_test.go b/ipv4/header_test.go
index 4e57139..cdf27fd 100644
--- a/ipv4/header_test.go
+++ b/ipv4/header_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/helper.go b/ipv4/helper.go
index acecfd0..0838979 100644
--- a/ipv4/helper.go
+++ b/ipv4/helper.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/icmp.go b/ipv4/icmp.go
index e869c23..097bea8 100644
--- a/ipv4/icmp.go
+++ b/ipv4/icmp.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/mocktransponder_test.go b/ipv4/mocktransponder_test.go
index e55aaee..e96c48a 100644
--- a/ipv4/mocktransponder_test.go
+++ b/ipv4/mocktransponder_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/multicast_test.go b/ipv4/multicast_test.go
index 5a0793c..bcf4973 100644
--- a/ipv4/multicast_test.go
+++ b/ipv4/multicast_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/multicastlistener_test.go b/ipv4/multicastlistener_test.go
index ccac56a..a0c24b5 100644
--- a/ipv4/multicastlistener_test.go
+++ b/ipv4/multicastlistener_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/multicastsockopt_test.go b/ipv4/multicastsockopt_test.go
index d730d31..f7efac2 100644
--- a/ipv4/multicastsockopt_test.go
+++ b/ipv4/multicastsockopt_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/packet.go b/ipv4/packet.go
index 0986431..a4ff815 100644
--- a/ipv4/packet.go
+++ b/ipv4/packet.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/payload.go b/ipv4/payload.go
index d7698cb..25ca8a5 100644
--- a/ipv4/payload.go
+++ b/ipv4/payload.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/payload_cmsg.go b/ipv4/payload_cmsg.go
index 5da0cbe..9bcde8f 100644
--- a/ipv4/payload_cmsg.go
+++ b/ipv4/payload_cmsg.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/payload_nocmsg.go b/ipv4/payload_nocmsg.go
index b874de0..6f1b402 100644
--- a/ipv4/payload_nocmsg.go
+++ b/ipv4/payload_nocmsg.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/readwrite_test.go b/ipv4/readwrite_test.go
index a3d71d1..a2384b8 100644
--- a/ipv4/readwrite_test.go
+++ b/ipv4/readwrite_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/sockopt_asmreq.go b/ipv4/sockopt_asmreq.go
index 04b5a30..8092f1d 100644
--- a/ipv4/sockopt_asmreq.go
+++ b/ipv4/sockopt_asmreq.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/sockopt_asmreq_posix.go b/ipv4/sockopt_asmreq_posix.go
index 1db5f24..2259a39 100644
--- a/ipv4/sockopt_asmreq_posix.go
+++ b/ipv4/sockopt_asmreq_posix.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/sockopt_asmreq_stub.go b/ipv4/sockopt_asmreq_stub.go
index 0fbdf47..e655635 100644
--- a/ipv4/sockopt_asmreq_stub.go
+++ b/ipv4/sockopt_asmreq_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/sockopt_posix.go b/ipv4/sockopt_posix.go
index 30dd2d7..d806803 100644
--- a/ipv4/sockopt_posix.go
+++ b/ipv4/sockopt_posix.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/sockopt_stub.go b/ipv4/sockopt_stub.go
index c7278c1..4ff6099 100644
--- a/ipv4/sockopt_stub.go
+++ b/ipv4/sockopt_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/unicast_test.go b/ipv4/unicast_test.go
index 8d57fd0..bce8763 100644
--- a/ipv4/unicast_test.go
+++ b/ipv4/unicast_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv4/unicastsockopt_test.go b/ipv4/unicastsockopt_test.go
index 258247b..b047e51 100644
--- a/ipv4/unicastsockopt_test.go
+++ b/ipv4/unicastsockopt_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/control.go b/ipv6/control.go
index b7362aa..56303f0 100644
--- a/ipv6/control.go
+++ b/ipv6/control.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/control_rfc2292_unix.go b/ipv6/control_rfc2292_unix.go
index 178aa53..d1693af 100644
--- a/ipv6/control_rfc2292_unix.go
+++ b/ipv6/control_rfc2292_unix.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/control_rfc3542_unix.go b/ipv6/control_rfc3542_unix.go
index 46127ab..2800df4 100644
--- a/ipv6/control_rfc3542_unix.go
+++ b/ipv6/control_rfc3542_unix.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/control_stub.go b/ipv6/control_stub.go
index f373d58..24b40a8 100644
--- a/ipv6/control_stub.go
+++ b/ipv6/control_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/control_unix.go b/ipv6/control_unix.go
index a845038..7bd4210 100644
--- a/ipv6/control_unix.go
+++ b/ipv6/control_unix.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/control_windows.go b/ipv6/control_windows.go
index 2773a52..feef6ab 100644
--- a/ipv6/control_windows.go
+++ b/ipv6/control_windows.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/dgramopt_posix.go b/ipv6/dgramopt_posix.go
index abf4c27..46f7f2f 100644
--- a/ipv6/dgramopt_posix.go
+++ b/ipv6/dgramopt_posix.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/dgramopt_stub.go b/ipv6/dgramopt_stub.go
index d30d097..bc3290a 100644
--- a/ipv6/dgramopt_stub.go
+++ b/ipv6/dgramopt_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/doc.go b/ipv6/doc.go
index 7d75698..51c2334 100644
--- a/ipv6/doc.go
+++ b/ipv6/doc.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/endpoint.go b/ipv6/endpoint.go
index 60e7d93..b988782 100644
--- a/ipv6/endpoint.go
+++ b/ipv6/endpoint.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/gen.go b/ipv6/gen.go
index 2f27bbe..41886ec 100644
--- a/ipv6/gen.go
+++ b/ipv6/gen.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/genericopt_posix.go b/ipv6/genericopt_posix.go
index 3c4957f..0a8d988 100644
--- a/ipv6/genericopt_posix.go
+++ b/ipv6/genericopt_posix.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/genericopt_stub.go b/ipv6/genericopt_stub.go
index 5b753cb..9dfc57d 100644
--- a/ipv6/genericopt_stub.go
+++ b/ipv6/genericopt_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/helper.go b/ipv6/helper.go
index 53b9999..7a42e58 100644
--- a/ipv6/helper.go
+++ b/ipv6/helper.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/icmp.go b/ipv6/icmp.go
index 62f1b4b..df9e4fb 100644
--- a/ipv6/icmp.go
+++ b/ipv6/icmp.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/icmp_bsd.go b/ipv6/icmp_bsd.go
index 93bf2f8..e1a791d 100644
--- a/ipv6/icmp_bsd.go
+++ b/ipv6/icmp_bsd.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/icmp_linux.go b/ipv6/icmp_linux.go
index f594822..647f6b4 100644
--- a/ipv6/icmp_linux.go
+++ b/ipv6/icmp_linux.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/icmp_solaris.go b/ipv6/icmp_solaris.go
index cbcfbfb..7c23bb1 100644
--- a/ipv6/icmp_solaris.go
+++ b/ipv6/icmp_solaris.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/icmp_stub.go b/ipv6/icmp_stub.go
index f89ad44..3cd84e1 100644
--- a/ipv6/icmp_stub.go
+++ b/ipv6/icmp_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/icmp_test.go b/ipv6/icmp_test.go
index ae99e6d..d8e9675 100644
--- a/ipv6/icmp_test.go
+++ b/ipv6/icmp_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/icmp_windows.go b/ipv6/icmp_windows.go
index d5a1577..443cd07 100644
--- a/ipv6/icmp_windows.go
+++ b/ipv6/icmp_windows.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/mocktransponder_test.go b/ipv6/mocktransponder_test.go
index d587922..6efe56c 100644
--- a/ipv6/mocktransponder_test.go
+++ b/ipv6/mocktransponder_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/multicast_test.go b/ipv6/multicast_test.go
index 3d53279..1647375 100644
--- a/ipv6/multicast_test.go
+++ b/ipv6/multicast_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/multicastlistener_test.go b/ipv6/multicastlistener_test.go
index f105722..044db15 100644
--- a/ipv6/multicastlistener_test.go
+++ b/ipv6/multicastlistener_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/multicastsockopt_test.go b/ipv6/multicastsockopt_test.go
index dcf8c3c..9e6b902 100644
--- a/ipv6/multicastsockopt_test.go
+++ b/ipv6/multicastsockopt_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/payload.go b/ipv6/payload.go
index 529b20b..682ff22 100644
--- a/ipv6/payload.go
+++ b/ipv6/payload.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/payload_cmsg.go b/ipv6/payload_cmsg.go
index 8e90d32..3a33585 100644
--- a/ipv6/payload_cmsg.go
+++ b/ipv6/payload_cmsg.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/payload_nocmsg.go b/ipv6/payload_nocmsg.go
index 499204d..9731cba 100644
--- a/ipv6/payload_nocmsg.go
+++ b/ipv6/payload_nocmsg.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sockopt_asmreq_posix.go b/ipv6/sockopt_asmreq_posix.go
index 3bdc151..cd36739 100644
--- a/ipv6/sockopt_asmreq_posix.go
+++ b/ipv6/sockopt_asmreq_posix.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sockopt_posix.go b/ipv6/sockopt_posix.go
index 927a35e..e0a3fa6 100644
--- a/ipv6/sockopt_posix.go
+++ b/ipv6/sockopt_posix.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sockopt_stub.go b/ipv6/sockopt_stub.go
index 427d300..6d59a00 100644
--- a/ipv6/sockopt_stub.go
+++ b/ipv6/sockopt_stub.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sockopt_test.go b/ipv6/sockopt_test.go
index 93a804b..774338d 100644
--- a/ipv6/sockopt_test.go
+++ b/ipv6/sockopt_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sys_bsd.go b/ipv6/sys_bsd.go
index 5c03e7f..c22f8ac 100644
--- a/ipv6/sys_bsd.go
+++ b/ipv6/sys_bsd.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sys_darwin.go b/ipv6/sys_darwin.go
index 2900b72..ffcc9d4 100644
--- a/ipv6/sys_darwin.go
+++ b/ipv6/sys_darwin.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sys_freebsd.go b/ipv6/sys_freebsd.go
index 9ccc657..fd5204b 100644
--- a/ipv6/sys_freebsd.go
+++ b/ipv6/sys_freebsd.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sys_linux.go b/ipv6/sys_linux.go
index 5ff18b5..42f5f78 100644
--- a/ipv6/sys_linux.go
+++ b/ipv6/sys_linux.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/sys_windows.go b/ipv6/sys_windows.go
index 63efc4a..003c507 100644
--- a/ipv6/sys_windows.go
+++ b/ipv6/sys_windows.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/syscall_unix.go b/ipv6/syscall_unix.go
index 52eb9bd..58a75b5 100644
--- a/ipv6/syscall_unix.go
+++ b/ipv6/syscall_unix.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/unicast_test.go b/ipv6/unicast_test.go
index 087e341..406d071 100644
--- a/ipv6/unicast_test.go
+++ b/ipv6/unicast_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/ipv6/unicastsockopt_test.go b/ipv6/unicastsockopt_test.go
index 4378874..1c52b3d 100644
--- a/ipv6/unicastsockopt_test.go
+++ b/ipv6/unicastsockopt_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/netutil/listen.go b/netutil/listen.go
index b317ba2..56f43bf 100644
--- a/netutil/listen.go
+++ b/netutil/listen.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/netutil/listen_test.go b/netutil/listen_test.go
index c1a3d55..5e07d7b 100644
--- a/netutil/listen_test.go
+++ b/netutil/listen_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/webdav/internal/xml/example_test.go b/webdav/internal/xml/example_test.go
index becedd5..21b48de 100644
--- a/webdav/internal/xml/example_test.go
+++ b/webdav/internal/xml/example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/webdav/internal/xml/read.go b/webdav/internal/xml/read.go
index 75b9f2b..3ece08c 100644
--- a/webdav/internal/xml/read.go
+++ b/webdav/internal/xml/read.go
@@ -1,4 +1,4 @@
-// Copyright 2009 The Go Authors.  All rights reserved.
+// Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/webdav/internal/xml/typeinfo.go b/webdav/internal/xml/typeinfo.go
index c9a6421..fdde288 100644
--- a/webdav/internal/xml/typeinfo.go
+++ b/webdav/internal/xml/typeinfo.go
@@ -1,4 +1,4 @@
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/webdav/internal/xml/xml_test.go b/webdav/internal/xml/xml_test.go
index 312a7c9..af4cf8e 100644
--- a/webdav/internal/xml/xml_test.go
+++ b/webdav/internal/xml/xml_test.go
@@ -1,4 +1,4 @@
-// Copyright 2009 The Go Authors.  All rights reserved.
+// Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/xsrftoken/xsrf.go b/xsrftoken/xsrf.go
index 8d21878..881bf19 100644
--- a/xsrftoken/xsrf.go
+++ b/xsrftoken/xsrf.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/xsrftoken/xsrf_test.go b/xsrftoken/xsrf_test.go
index 9933f86..6c8e7d9 100644
--- a/xsrftoken/xsrf_test.go
+++ b/xsrftoken/xsrf_test.go
@@ -1,4 +1,4 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.