Minor code re-formatting and documentation changes

AFNetworking/AFNetworkActivityIndicatorManager.h

@@ -30,7 +30,7 @@
 /**
  `AFNetworkActivityIndicatorManager` manages the state of the network activity indicator in the status bar. When enabled, it will listen for notifications indicating that a network request operation has started or finished, and start or stop animating the indicator accordingly. The number of active requests is incremented and decremented much like a stack or a semaphore, and the activity indicator will animate so long as that number is greater than zero.
  */
-@interface AFNetworkActivityIndicatorManager : NSObject;
+@interface AFNetworkActivityIndicatorManager : NSObject
 
 /**
  A Boolean value indicating whether the manager is enabled. 
@@ -39,6 +39,11 @@
  */
 @property (nonatomic, assign, getter = isEnabled) BOOL enabled;
 
+/**
+ A Boolean value indicating whether the network activity indicator is currently displayed in the status bar.
+ */
+@property (readonly, nonatomic, assign) BOOL isNetworkActivityIndicatorVisible; 
+
 /**
  Returns the shared network activity indicator manager object for the system.
  
@@ -56,11 +61,6 @@
  */
 - (void)decrementActivityCount;
 
-/**
- Returns the network indicator visibility. This is more excact than polling [UIApplication sharedApplication] isNetworkActivityIndicatorVisible] since we add a slight delay while updating the indicator to avoid flickering. You can observe this via KVO.
- */
-- (BOOL)isNetworkActivityIndicatorVisible;
-
 @end
 
 #endif

AFNetworking/AFNetworkActivityIndicatorManager.m

@@ -96,7 +96,7 @@ static NSTimeInterval const kAFNetworkActivityIndicatorInvisibilityDelay = 0.25;
     });
 }
 
-// not actually exposed, but will be used if someone tries to set activityCount via KVC.
+// Not exposed, but used if activityCount is set via KVC.
 - (void)setActivityCount:(NSInteger)activityCount {
     __sync_swap(&_activityCount, activityCount);
     [self updateNetworkActivityIndicatorVisibilityDelayed];
@@ -113,8 +113,8 @@ static NSTimeInterval const kAFNetworkActivityIndicatorInvisibilityDelay = 0.25;
     [self willChangeValueForKey:@"activityCount"];
     bool success;
     do {
-        int32_t orig = _activityCount;
+        int32_t currentCount = _activityCount;
-        success = OSAtomicCompareAndSwap32(orig, MIN(orig - 1, orig), &_activityCount);
+        success = OSAtomicCompareAndSwap32(currentCount, MIN(currentCount - 1, currentCount), &_activityCount);
     } while(!success);
     [self didChangeValueForKey:@"activityCount"];
     [self updateNetworkActivityIndicatorVisibilityDelayed];