My out seems right by I’m missing a space before the word three

Question

https://code.sololearn.com/c3f6d7CYsw4u/?ref=app

Answer 1

// my output == "(\n one\n two\n (\n three\n )\n)\n".
// result output == "(\n one\n two\n (\n three\n )\n)\n"

Its hard to see in here. The result should have two spaces b4 the word three but mine is only doing one space.