Minor tweaks

Sources/Defaults/Defaults.swift

@@ -131,8 +131,8 @@ extension Defaults {
 	}
 }
 
-extension Defaults.Key where Value: _DefaultsOptionalType {
-	public convenience init(_ key: String, suite: UserDefaults = .standard) {
+extension Defaults.Key {
+	public convenience init<T>(_ key: String, suite: UserDefaults = .standard) where Value == T? {
 		self.init(key, default: nil, suite: suite)
 	}
 }

Sources/Defaults/Observation+Combine.swift

@@ -143,7 +143,7 @@ extension Defaults {
 				DefaultsPublisher(suite: key.suite, key: key.name, options: options)
 					.map { _ in () }
 					.eraseToAnyPublisher()
-			}.reduce(initial) { (combined, keyPublisher) in
+			}.reduce(initial) { combined, keyPublisher in
 				combined.merge(with: keyPublisher).eraseToAnyPublisher()
 			}
 

Sources/Defaults/Observation.swift

@@ -83,11 +83,11 @@ extension Defaults {
 		let oldValue: Any?
 
 		init(change: [NSKeyValueChangeKey: Any]) {
-			kind = NSKeyValueChange(rawValue: change[.kindKey] as! UInt)!
-			indexes = change[.indexesKey] as? IndexSet
-			isPrior = change[.notificationIsPriorKey] as? Bool ?? false
-			oldValue = change[.oldKey]
-			newValue = change[.newKey]
+			self.kind = NSKeyValueChange(rawValue: change[.kindKey] as! UInt)!
+			self.indexes = change[.indexesKey] as? IndexSet
+			self.isPrior = change[.notificationIsPriorKey] as? Bool ?? false
+			self.oldValue = change[.oldKey]
+			self.newValue = change[.newKey]
 		}
 	}
 
@@ -168,7 +168,7 @@ extension Defaults {
 			lifetimeAssociation?.cancel()
 		}
 
-		private var lifetimeAssociation: LifetimeAssociation? = nil
+		private var lifetimeAssociation: LifetimeAssociation?
 
 		public func tieToLifetime(of weaklyHeldObject: AnyObject) -> Self {
 			lifetimeAssociation = LifetimeAssociation(of: self, with: weaklyHeldObject, deinitHandler: { [weak self] in

Tests/DefaultsTests/DefaultsTests.swift

@@ -378,7 +378,7 @@ final class DefaultsTests: XCTestCase {
 			expect.fulfill()
 		}
 
-		Defaults[key] = "world";
+		Defaults[key] = "world"
 		cancellable.cancel()
 		waitForExpectations(timeout: 10)
 	}
@@ -573,7 +573,7 @@ final class DefaultsTests: XCTestCase {
 		let expect = expectation(description: "Observation closure being called")
 
 		weak var observation: Defaults.Observation!
-		observation = Defaults.observe(key, options: []) { change in
+		observation = Defaults.observe(key, options: []) { _ in
 			observation.invalidate()
 			expect.fulfill()
 		}.tieToLifetime(of: self)