crypto/x509: add blank line before package declaration

The package doc included the copying header by mistake.

Change-Id: I37ac2d14b1b8a389e6b603fbb1c6a3a33b1d80d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/440456
Reviewed-by: Ian Lance Taylor <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Joedian Reid <[email protected]>

Author: ideapark

src/crypto/x509/parser.go

@@ -1,6 +1,7 @@
 // Copyright 2021 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.
+
 package x509
 
 import (

src/crypto/x509/parser_test.go

@@ -1,6 +1,7 @@
 // Copyright 2021 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.
+
 package x509
 
 import (