homestead up時のエラーが治りません...

###前提・実現したいこと
[リンク内容](https://drapondotcom.wordpress.com/2016/02/03/vagrant%E3%81%ABlaravel5%E3%81%AE%E9%96%8B%E7%99%BA%E7%92%B0%E5%A2%83%E3%82%92%E6%A7%8B%E7
%AF%89/)
こちらのページを参考にVagrantにLaravel5の環境を構築中です。
その過程で発生したエラーが解決できずに困窮しています...

「VAGRANT BOXを起動する」の地点で詰まっています。
Homestead initし、生成された.Yamlファイルを書き換え、その後Homestead upすると、下記のエラーが発生。
###発生している問題・エラーメッセージ

/opt/vagrant/embedded/lib/ruby/2.4.0/psych.rb:377:in `parse': (<unknown>): could not find expected ':' while scanning a simple key at line 9 column 1 (Psych::SyntaxError)
	from /opt/vagrant/embedded/lib/ruby/2.4.0/psych.rb:377:in `parse_stream'
	from /opt/vagrant/embedded/lib/ruby/2.4.0/psych.rb:325:in `parse'
	from /opt/vagrant/embedded/lib/ruby/2.4.0/psych.rb:252:in `load'
	from /Users/yamakemono/.composer/vendor/laravel/homestead/Vagrantfile:20:in `block in <top (required)>'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/config/v2/loader.rb:37:in `load'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/config/loader.rb:125:in `block (2 levels) in load'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/config/loader.rb:119:in `each'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/config/loader.rb:119:in `block in load'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/config/loader.rb:116:in `each'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/config/loader.rb:116:in `load'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/vagrantfile.rb:28:in `initialize'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/environment.rb:810:in `new'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/environment.rb:810:in `vagrantfile'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/environment.rb:556:in `host'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/environment.rb:214:in `block in action_runner'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/action/runner.rb:33:in `run'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/environment.rb:543:in `hook'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/lib/vagrant/environment.rb:792:in `unload'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/bin/vagrant:141:in `ensure in <main>'
	from /opt/vagrant/embedded/gems/gems/vagrant-2.0.1/bin/vagrant:141:in `<main>'

###該当のソースコード

ip: "192.168.10.10"
memory: 2048
cpus: 1
provider: virtualbox

authorize: ~/.ssh/id_rsa.pub #公開鍵の場所

keys:
– ~/.ssh/id_rsa #秘密鍵の場所

folders:
#– map: ~/Code
#to: /home/vagrant/Code
– map: ~/Develop
to: /home/vagrant/Develop
#今回はDevelopフォルダで開発を行う為、Developへ変更

sites:
– map: homestead.app
#to: /home/vagrant/Code/Laravel/public
to: /home/vagrant/Develop/laravel5/public
#laravel5というプロジェクト名にしたいので、変更。

databases:
– homestead

variables:
– key: APP_ENV
value: local

# blackfire:
# – id: foo
# token: bar
# client-id: foo
# client-token: bar

# ports:
# – send: 93000
# to: 9300
# – send: 7777
# to: 777
# protocol: udp

###試したこと
多数の文献で.Yamlファイル内にタブがあると発生するエラーということを知り、エディタ（ATOM）の機能でタブをスペースへ一括変換し保存、サイドHomestead upしましたが効果はありませんでした。

どなたか他の問題が思い当たる方、ご教示いただけますと幸いです。
よろしくお願いいたします。

###補足情報(言語/FW/ツール等のバージョンなど)

環境、各バージョンなど
Mac OS ver10.12(Sierra)
PHP 5.6.2
Vagrant 2.0.1
Composer version 1.5.6
laravel/homestead v2.2.2