ReactiveCocoa/ReactiveCocoa — pull request #1453 by hfossli (2014-08-08 18:09:53+00:00)
Title: subscribeErrorOrCompleted

It is too tedious to write something like this over and over again
```
void (^onDone)() = ^{
// do something
};

[signal subscribeError:^(NSError *error) {
onDone();
} completed:^{
onDone();
}];
```