Java: JavadocElement location is off by one

### Version
CodeQL CLI v.2.5.2

### Description
It appears for every `JavadocElement` the location within the Java source is off by one, and this adds up for every subsequent element.

### Example
Java source:
```java
/**
* test1234567890
* test1234567890
* test1234567890
* test1234567890
* test1234567890
* @author test1234567890
* @author test1234567890
* @author test1234567890
* @author test1234567890
* @author test1234567890
*/
class Test {
}
```

Code QL query:
```ql
import java

from JavadocElement j
select j, j.getLocation().getStartColumn()
```

Run the query for example in VSCode and click on each of the results
:x: Each `JavadocElement` is shifted to the left by one (in addition to the offset of previous elements):