Error in Grails documentation of URL Mappings exclude

In 6.4.6 Mapping Wildcards is written that you exclude URIs like this:

static excludes = ["/images/**", "/css/**"]

But this didn’t work for me. Looking at the source code (UrlMappingsFilter) I found out, that the exclude is no wildcard pattern matching and only a startsWith matching:

for (String excludePattern:excludePatterns){
    if (uri.equals(excludePattern)||
            (excludePattern.endsWith("*")&&
                    excludePattern.substring(0,excludePattern.length()-1).
                            regionMatches(0,uri,0,excludePattern.length()-1))){
        processFilterChain(request, response, filterChain);
        return;
    }
}

So the correct way is with one asterisk:

static excludes = ["/images/*", "/css/*"]