Add default value for the bundle argument in UIStoryboard.init(name: bundle:)

Originator:asbreckenridge
Number:rdar://42488708 Date Originated:July 22 2018, 10:09 PM
Status:OPEN Resolved:
Product:iOS + SDK Product Version:
Classification: Reproducible:
 
This difference would change the initializer (perhaps only in the .apinotes for swift) from 

```
public /*not inherited*/ init(name: String, bundle storyboardBundleOrNil: Bundle?)
```

to 

```
public /*not inherited*/ init(name: String, bundle storyboardBundlel: Bundle = .main)
```

This is a small change that improves readability & clarity, since I assume that if the `bundle` param passed into the UIStoryboard initializer is `nil`, the initializer defaults the value to the main bundle.

Comments


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!