Python Can'；t让sphinx在目录树下链接到另一个文档

我试图学习狮身人面像，我只是停留在基本的例子。我在源目录中的

makehtml

上遇到以下错误

Running Sphinx v1.1.3
loading pickled environment... not yet created
building [html]: targets for 2 source files that are out of date
updating environment: 2 added, 0 changed, 0 removed
reading sources... [100%] intro                                                 
/home/owner/Desktop/doc/index.rst:11: ERROR: Error in "toctree" directive:
invalid option block.

.. toctree::
   :maxdepth: 2
   intro.rst
looking for now-outdated files... none found
pickling environment... done
checking consistency... /home/owner/Desktop/doc/intro.rst:: WARNING: document isn't included in any toctree
done
preparing documents... done
writing output... [100%] intro                                                  
writing additional files... genindex search
copying static files... done
dumping search index... done
dumping object inventory... done
build succeeded, 2 warnings.

Build finished. The HTML pages are in _build/html.

---

我还尝试了引用

intro

而不是

intro.rst

这两种方法似乎都不起作用

index.rst

和

intro.rst

位于同一目录中。我用

sphinx quickstart

和所有默认选项创建了这个项目。

在指令的选项和内容之间需要一个空行。您也不需要文件扩展名。将其更改为：

.. toctree::
   :maxdepth: 2

   intro

---

那该死的空行花了我6个小时！