Clarify typing of PBGitRepository ivars

Author: tiennou

Classes/git/PBGitRepository.h

@@ -42,10 +42,10 @@ typedef enum branchFilterTypes {
 @property (readonly, getter = getIndexURL) NSURL* indexURL;
 
 @property (nonatomic, strong) PBGitHistoryList *revisionList;
-@property (nonatomic, readonly, strong) NSArray* stashes;
-@property (nonatomic, readonly, strong) NSArray* branches;
-@property (nonatomic, strong) NSMutableOrderedSet* branchesSet;
-@property (nonatomic, strong) PBGitRevSpecifier* currentBranch;
+@property (nonatomic, readonly, strong) NSArray <PBGitStash *> *stashes;
+@property (nonatomic, readonly, strong) NSArray <PBGitRevSpecifier *> *branches;
+@property (nonatomic, strong) NSMutableOrderedSet <PBGitRevSpecifier *> *branchesSet;
+@property (nonatomic, strong) PBGitRevSpecifier *currentBranch;
 @property (nonatomic, strong) NSMutableDictionary* refs;
 @property (readonly, strong) GTRepository* gtRepo;
 @property (nonatomic, readonly) BOOL isShallowRepository;
@@ -113,7 +113,7 @@ typedef enum branchFilterTypes {
 - (BOOL)refExists:(PBGitRef *)ref;
 - (PBGitRef *)refForName:(NSString *)name;
 
-- (NSArray *) remotes;
+- (NSArray <NSString *> *) remotes;
 - (BOOL) hasRemotes;
 - (PBGitRef *) remoteRefForBranch:(PBGitRef *)branch error:(NSError **)error;
 

Classes/git/PBGitRepository.m

@@ -448,7 +448,7 @@ - (PBGitRef *)refForName:(NSString *)name
 	return [PBGitRef refFromString:refName];
 }
 
-- (NSArray*)branches
+- (NSArray <PBGitRevSpecifier *> *)branches
 {
     return [self.branchesSet array];
 }
@@ -510,7 +510,7 @@ - (void) setHasChanged:(BOOL)newHasChanged {
 
 #pragma mark Stashes
 
-- (NSArray *)stashes
+- (NSArray <PBGitStash *> *)stashes
 {
 	NSMutableArray *stashes = [NSMutableArray array];
 	[self.gtRepo enumerateStashesUsingBlock:^(NSUInteger index, NSString *message, GTOID *oid, BOOL *stop) {
@@ -623,7 +623,7 @@ - (PBGitIndex *)index
 
 #pragma mark Remotes
 
-- (NSArray *) remotes
+- (NSArray <NSString *> *)remotes
 {
 	NSError *error = nil;
 	NSArray *remotes = [self.gtRepo remoteNamesWithError:&error];