[misc](readme): update sample example local variable name

pigfly · pigfly · commit b6f11ca2a2fe · 2018-05-09T22:09:08.000+10:00
diff --git a/README.md b/README.md
@@ -57,8 +57,8 @@ final class ViewController: UIViewController {
 
     @IBAction func onButtonTapped(_ sender: UIButton) {
         let vm = FullScreenImageBrowserViewModel(media: media)
-        let x = FullScreenImageBrowser(viewModel: vm)
-        present(x, animated: true, completion: nil)
+        let browser = FullScreenImageBrowser(viewModel: vm)
+        present(browser, animated: true, completion: nil)
     }
 
 }
@@ -192,4 +192,4 @@ A-J-Full-Screen-Image-Browser is owned and maintained by the [Alex Jiang](https:
 
 ## License
 
-A-J-Full-Screen-Image-Browser is released under the MIT license.
+A-J-Full-Screen-Image-Browser is released under the MIT license.

Original file line number	Diff line number	Diff line change
`@@ -57,8 +57,8 @@ final class ViewController: UIViewController {`
`57`	`57`
`58`	`58`	`@IBAction func onButtonTapped(_ sender: UIButton) {`
`59`	`59`	`let vm = FullScreenImageBrowserViewModel(media: media)`
`60`		`- let x = FullScreenImageBrowser(viewModel: vm)`
`61`		`- present(x, animated: true, completion: nil)`
	`60`	`+ let browser = FullScreenImageBrowser(viewModel: vm)`
	`61`	`+ present(browser, animated: true, completion: nil)`
`62`	`62`	`}`
`63`	`63`
`64`	`64`	`}`
`@@ -192,4 +192,4 @@ A-J-Full-Screen-Image-Browser is owned and maintained by the [Alex Jiang](https:`
`192`	`192`
`193`	`193`	`## License`
`194`	`194`
`195`		`-A-J-Full-Screen-Image-Browser is released under the MIT license.`
	`195`	`+A-J-Full-Screen-Image-Browser is released under the MIT license.`