javadoc tool Incorrect error message about malformed link

The error message for this malformed javadoc comment is incorrect.

```/**
 * {@link foo().
 */
public class JavaDocBug {
}```

The messages are:
 % javadoc JavaDocBug.java
Loading source file JavaDocBug.java...
Constructing Javadoc information...
Building index for all the packages and classes...
Standard Doclet version 16+36-2231
Building tree for all the packages and classes...
JavaDocBug.java:2: error: ')' missing in reference
 * {@link foo().
   ^