Broken example in docs

[benmccann]

The very first example in the docs is:

 .groupBy(new KeyFunction<Object>() {
     public Object apply(List<Object> row) {
         return Date.class.cast(row.get(0)).getMonth();  
 })

This is missing an end brace and should be:

 .groupBy(new KeyFunction<Object>() {
     public Object apply(List<Object> row) {
         return Date.class.cast(row.get(0)).getMonth();  
     }
 })

But a much better way to write it would be:

.groupBy(row -> Date.class.cast(row.get(0)).getMonth())