wasmtime::component::bindgen! generated doc-comments have an extra `/`

With:

```toml
wasmtime = { version = "41.0.3", features = ["component-model"] }
```

When I expand the code generated by this macro:

```rust
wasmtime::component::bindgen!({
world: "plugin",
path: "../wit",
});
```

There appears to be additional `/` ending up in the actual doc comments:

```rust
#[doc = "/ Auto-generated bindings for a pre-instantiated version of a"]
#[doc = "/ component which implements the world `plugin`."]
#[doc = "/"]
#[doc = "/ This structure is created through [`PluginPre::new`] which"]
#[doc = "/ takes a [`InstancePre`](wasmtime::component::InstancePre) that"]
#[doc = "/ has been created through a [`Linker`](wasmtime::component::Linker)."]
#[doc = "/"]
#[doc = "/ For more information see [`Plugin`] as well."]
pub struct PluginPre {
instance_pre: wasmtime::component::InstancePre,
indices: PluginIndices,
}
```