Javadoc parsing doesn't properly parse <pre>{@code .... }</pre> sequences

The following:

```
public class C {

/**
* Performs:
*

{@code

     *    for (String s : strings) {

     *        if (s.equals(value)) {

     * 	          return 0;

     *        }

     *        if (s.startsWith(value)) {

     *            return 1;

     *        }

     *    }

     *    return -1;

     * }

*/
int check (String value, String[] strings) {
for (String s : strings) {
if (s.equals(value)) {
return 0;
}
if (s.startsWith(value)) {
return 1;
}
}
return -1;
}

}
```

is parsed incorrectly for the @code tag. It treats the first end curly brace (after return 0;) as the end of the @code tag and then passes TextElements for each line following. This caused the Javadoc hover to display the extraneous } before . I have made a workaround fix to JDT UI that will handle this, but it would be best if the parser could recognize such a sequence and ignore the end curly braces until it finds the one preceding .

The hover issue is currently tracked by https://github.com/eclipse-jdt/eclipse.jdt.ui/issues/316