Fix anchor

Author: harryhanYuhao

src/doc/rustdoc/src/what-is-rustdoc.md

@@ -73,7 +73,7 @@ check it out! It should show a link to the `foo` function's page, which
 is located at `doc/docs/fn.foo.html`. On that page, you'll see the "foo is
 a function" we put inside the documentation comment in our crate.
 
-## <a name="rustdoc-cargo"></a> Using rustdoc with Cargo
+## Using rustdoc with Cargo
 
 Cargo also has integration with `rustdoc` to make it easier to generate
 docs. Instead of the `rustdoc` command, we could have done this:
@@ -82,7 +82,7 @@ docs. Instead of the `rustdoc` command, we could have done this:
 $ cargo doc
 ```
 
-If you want `cargo` to open the generated documentation once generated, you can use:
+If you want `cargo` to automatically open the generated documentation, you can use:
 
 ```bash
 $ cargo doc --open