Remove first line if empty and remove comment lines
@param {Value} block
@param {Array<{line: number, str: string}>} lines
@returns {Array<{line: number, str: string}>}
function cleanLines(block, lines) {
		var removeFirst = false
		if (lines.length && emptyRegex.test(lines[0].str)) {
			block.line += 1
			block.size -= 1
			removeFirst = true
		}

		return lines.filter(function (each, i) {
			return !(!i && removeFirst) && !commentRegex.test(each.str)
		})
	}