src/vs/editor/common/diff/smartLinesDiffComputer.ts/CharSequence/toString
class CharSequence:	public toString() {
		return (
			'[' + this._charCodes.map((s, idx) => (s === CharCode.LineFeed ? '\\n' : String.fromCharCode(s)) + `-(${this._lineNumbers[idx]},${this._columns[idx]})`).join(', ') + ']'
		);
	}