Start getting used to `⌘-[` and `⌘-]` :trollface: For RAC code, I also disable Xcode's "Automatically indent based on syntax" setting.

The RAC way to indent this code would be:

```objc
return [[[[[RACSignal
    defer:^{
        @strongify(self);
        return [RACSignal return:self.manager];
    }]
    concat:[[self
        rac_signalForSelector:@selector(centralManagerDidUpdateState:) fromProtocol:@protocol(CBCentralManagerDelegate)]
        reduceEach:^(CBCentralManager *manager) {
            return manager;
        }]]
    map:^(CBCentralManager *manager) {
        return @(manager.state);
    }]
    takeUntil:self.rac_willDeallocSignal]
    setNameWithFormat:@"RBTCentralManager -stateSignal"];
```