如何在构建字符串时保持上一行的缩进

indentation = "    "  # 4个空格作为缩进
lines = [
    "第一行",
    indentation + "第二行",
    indentation + indentation + "第三行",
    indentation + "第四行"
]
result = "\n".join(lines)
print(result)

var indentation = "    "; // 4个空格作为缩进
var lines = [
    "第一行",
    indentation + "第二行",
    indentation + indentation + "第三行",
    indentation + "第四行"
];
var result = lines.join("\n");
console.log(result);

String indentation = "    "; // 4个空格作为缩进
String[] lines = {
    "第一行",
    indentation + "第二行",
    indentation + indentation + "第三行",
    indentation + "第四行"
};
String result = String.join("\n", lines);
System.out.println(result);