Fix a typo (#3576)

Author: paulb777

FirebaseABTesting/Sources/FIRExperimentController.m

@@ -91,9 +91,9 @@
   return [experimentsToSet copy];
 }
 
-/// Returns a list of experiments to be clearred given the payloads and current list of
+/// Returns a list of experiments to be cleared given the payloads and current list of
 /// experiments from Firebase Analytics. If an experiment is in experiments but not in payloads, it
-/// should be clearred in Firebase Analytics.
+/// should be cleared in Firebase Analytics.
 NSArray *ABTExperimentsToClearFromPayloads(
     NSArray<NSData *> *payloads,
     NSArray<NSDictionary<NSString *, NSString *> *> *experiments,

FirebaseABTesting/Sources/Public/FIRLifecycleEvents.h

@@ -44,7 +44,7 @@ NS_SWIFT_NAME(LifecycleEvents)
 /// experiment payload.
 @property(nonatomic, copy) NSString *activateExperimentEventName;
 
-/// Event name for when an experiment is clearred. It is default to FIRClearExperimentEventName and
+/// Event name for when an experiment is cleared. It is default to FIRClearExperimentEventName and
 /// can be overridden. If experiment payload has a valid string of this field, always use experiment
 /// payload.
 @property(nonatomic, copy) NSString *clearExperimentEventName;