Fixed whitespacing issues

Author: syoutsey

Foundation/NSCalendar.swift

@@ -370,8 +370,8 @@ public class NSCalendar : NSObject, NSCopying, NSSecureCoding {
         if let tz = tempTz {
             self.timeZone = tz
         } else {
-			self.timeZone = oldTz
-		}
+            self.timeZone = oldTz
+        }
 
         var at: CFAbsoluteTime = 0.0
         let res: Bool = withUnsafeMutablePointer(&at) { t in
@@ -383,8 +383,8 @@ public class NSCalendar : NSObject, NSCopying, NSSecureCoding {
         if res {
             return NSDate(timeIntervalSinceReferenceDate: at)
         } else {
-			return nil
-		}
+            return nil
+        }
     }
 
     private func _setup(unitFlags: NSCalendarUnit, field: NSCalendarUnit, type: String, inout compDesc: [Int8]) {