Apply Latest Formatting (#3760)

### Goals :soccer:
This PR applies the latest SwiftFormat.

Example/Source/AppDelegate.swift

@@ -24,7 +24,7 @@
 
 import UIKit
 
-@UIApplicationMain
+@main
 class AppDelegate: UIResponder, UIApplicationDelegate, UISplitViewControllerDelegate {
     // MARK: - Properties
 

Source/ServerTrustEvaluation.swift

@@ -1,5 +1,5 @@
 //
-//  ServerTrustPolicy.swift
+//  ServerTrustEvaluation.swift
 //
 //  Copyright (c) 2014-2016 Alamofire Software Foundation (http://alamofire.org/)
 //

Tests/AuthenticationInterceptorTests.swift

@@ -288,7 +288,7 @@ final class AuthenticationInterceptorTestCase: BaseTestCase {
     }
 
     // MARK: - Tests - Retry
-  
+
     // If we not using swift-corelibs-foundation where URLRequest to /invalid/path is a fatal error.
     #if !canImport(FoundationNetworking)
     func testThatInterceptorDoesNotRetryWithoutResponse() {

Tests/ServerTrustEvaluatorTests.swift

@@ -1,5 +1,5 @@
 //
-//  ServerTrustPolicyTests.swift
+//  ServerTrustEvaluatorTests.swift
 //
 //  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
 //

Tests/TestHelpers.swift

@@ -1,5 +1,5 @@
 //
-//  HTTPBin.swift
+//  TestHelpers.swift
 //
 //  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
 //