`wit-abi` gets confused about imports

Moved from https://github.com/WebAssembly/wasi-tools/issues/17; the "tool" mentioned here is `wit-abi`:

Looking at the Markdown/HTML produced for wasi-nn, this tool seems to confuse the Markdown parser whether it should convert several lines to Markdown or print them as HTML: [`ml.md`](https://github.com/WebAssembly/wasi-nn/blob/main/ml.md#types-3). `wit-abi` happily produces intermixed Markdown and HTML until it gets to a point (I believe related to imports?) where it dumps something that gets displayed as:

```
#### `type tensor` [`tensor`](#tensor)

#### `type tensor-data` [`tensor-data`](#tensor_data)

#### `type graph` [`graph`](#graph)

#### `type graph-execution-context` `u32`
```

This is not a high priority issue but I thought I would report it while it's on my mind.