"'extends' is followed by whitespace" error thrown in 6.3

[athrog]

Running checkstyle against this example method:

public void foo(List<? extends String[]> bar) { }

results in this error:

Example.java:5:33: 'extends' is followed by whitespace.

Looks like this was introduced in 6.3:

$ java -jar checkstyle-6.2-all.jar -c checkstyle.xml src/Example.java 
Starting audit...
Audit done.
$ java -jar checkstyle-6.3-all.jar -c checkstyle.xml src/Example.java 
Starting audit...
Example.java:5:33: 'extends' is followed by whitespace.
Audit done.

My configuration looks like this:

<module name="Checker">
    <module name="TreeWalker">
        <module name="NoWhitespaceAfter"/>
    </module>
</module>

I looked at the docs to see if there is a way to workaround this, but I couldn't find a way to exclude the 'extends' keyword from this module.

[romani]

merged.