jshint/jshint — pull request #898 by guyzmo (2013-03-06 20:22:13+00:00)
Title: Generator functions support

Added support for generators function, e.g.:
```
function fib() {
var i = 0, j = 1;
while (true) {
yield i;
[i, j] = [j, i + j];
}
}

var g = fib();
for (let i = 0; i < 10; i++)
print(g.next());
```

this commit is based on the destructuring assignment (PR #884) tree