1.
This lines should have NO leading tab
	This line should have ONE leading tab
		This line should have TWO leading tabs
			This line should have THREE leading tabs
		This lines should have TWO leading tabs
	This line should have ONE leading tab
This line should have NO leading tab

2.
No tab inside: []
ONE tab inside: [	]
TWO tabs inside: [		]
THREE tabs inside: [			]
FOUR tabs inside: [				]