Annotations are not properly rendered in JavaDoc when using <pre>{@code}

```

<pre>{@code
{@literal @}Override
}</pre>

```


Produces
```

{ @}Override

```


Instead of:
```

@Override

```


Imported from Jira [BEAM-1295](https://issues.apache.org/jira/browse/BEAM-1295). Original Jira may contain additional context.
Reported by: staslev.