An extra whitespace indentation for the Apache License template

[XuehaiPan]

The Apache License template indents the URL with 5 spaces:

addlicense/tmpl.go

Lines 104 to 111 in 53d978a

	const tmplApache = `Copyright{{ if .Year }} {{.Year}}{{ end }} {{.Holder}}
	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at
	http://www.apache.org/licenses/LICENSE-2.0

where the letter h is under a:

You may obtain a copy of the License at
     |
     http://www.apache.org/licenses/LICENSE-2.0

The generated license also indent with 5 spaces:

addlicense/tmpl.go

Lines 1 to 8 in 53d978a

	// Copyright 2018 Google LLC
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//

In the Apache official license template: https://www.apache.org/licenses/LICENSE-2.0#apply

Copyright [yyyy] [name of copyright owner]

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

The URL is indented by 4 spaces and the letter h is under m.

You can also find the LICENSE file is indent by 4 spaces (h under m):

addlicense/LICENSE

Lines 190 to 197 in 53d978a

	Copyright [yyyy] [name of copyright owner]
	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at
	http://www.apache.org/licenses/LICENSE-2.0