fix unit tests

Author: Денис Морозов

UnitTests/Formatters/FTCMaskFormatter/FTCMaskFormatterTestCase.m

@@ -35,14 +35,12 @@ - (void)setUp
 {
 	[super setUp];
 
-	FTCMaskFormatterGenericConfig *configWithCutTail = [[FTCMaskFormatterGenericConfig alloc] initWithFormat:@"_ _ _ _ _"];
-	configWithCutTail.maskCharacter = '_';
+	FTCMaskFormatterGenericConfig *configWithCutTail = [[FTCMaskFormatterGenericConfig alloc] initWithFormat:@"__ _ _ _ _"];
 	configWithCutTail.cutTail = YES;
 
 	formatterWithCutTail = [[FTCMaskFormatter alloc] initWithConfig:configWithCutTail];
 
-	FTCMaskFormatterGenericConfig *configWithoutCutTail = [[FTCMaskFormatterGenericConfig alloc] initWithFormat:@"_ _ _ _ _"];
-	configWithoutCutTail.maskCharacter = '_';
+	FTCMaskFormatterGenericConfig *configWithoutCutTail = [[FTCMaskFormatterGenericConfig alloc] initWithFormat:@"__ _ _ _ _"];
 	configWithoutCutTail.cutTail = NO;
 
 	formatterWithoutCutTail = [[FTCMaskFormatter alloc] initWithConfig:configWithoutCutTail];