Correct readme

Author: soffes

Readme.markdown

@@ -30,7 +30,7 @@ For the sake of brevity, we'll `!` the rest of the examples since we know they'r
 
 ``` swift
 let (range, string) = diff("Hello world", "Hello there world")!
-// range: 6...6
+// range: 6..<6
 // string: "there "
 ```
 
@@ -50,7 +50,7 @@ Diff can diff any array. Here's an array of things that conform to `Equatable`:
 
 ``` swift
 let (range, replacement) = diff([1, 2, 3], [1, 2, 3, 4])!
-// range: 3...3
+// range: 3..<3
 // replacement: [4]
 ```
 
@@ -60,7 +60,7 @@ You can even use arrays of anything as long as you can compare them:
 let before: [Foo] = [a, b]
 let after: [Foo] = [b]
 let (range, replacement) = diff(before, after, compare: Foo.compare)!
-// range: 0...0
+// range: 0..<1
 // replacement: []
 ```