Fixed takeFirst prototype

README.md

@@ -2,17 +2,17 @@
 
 Set of Swift extensions for standard types and classes.
 
-# Installation 
+# Installation
 
 Because of Xcode errors it's not possible to integrate this project with Cocoapods or as Embedded Framework.
 [Read more at Dev Forum](https://devforums.apple.com/message/983747#983747)  
 
 ## Use submodule and copy source code
 1. Add ExSwift as a submodule
 2. Open the `ExSwift` project folder, and drag `ExSwift` sub folder with source code into the file navigator of your Xcode project. Make sure you select add to target
-3. Use it   
+3. Use it
 
-``` swift 
+``` swift
 components.takeFirst() { $0.completed }
 ```
 
@@ -69,7 +69,7 @@ Name | Signature
 **`at`**|`at (indexes: Int...) -> Array`
 **`take`**|`take (n: Int) -> Array`
 **`takeWhile`**|`takeWhile (condition: (Element) -> Bool) -> Array`
-**`takeFirst`**|`takeFirst (condition: (Element) -> Bool) -> Element`
+**`takeFirst`**|`takeFirst (condition: (Element) -> Bool) -> Element?`
 **`tail`**|`tail (n: Int) -> Array`
 **`skip`**|`skip (n: Int) -> Array`
 **`skipWhile`**|`skipWhile (condition: (Element) -> Bool) -> Array`