Replace uses of forEach with for-in loops.

Shared/Commands/DeleteCommand.swift

@@ -48,9 +48,9 @@ import Articles
 	func perform() {
 		
 		let group = DispatchGroup()
-		itemSpecifiers.forEach {
+		for itemSpecifier in itemSpecifiers {
 			group.enter()
-			$0.delete() {
+			itemSpecifier.delete() {
 				group.leave()
 			}
 		}
@@ -63,7 +63,9 @@ import Articles
 	}
 	
 	func undo() {
-		itemSpecifiers.forEach { $0.restore() }
+		for itemSpecifier in itemSpecifiers {
+			itemSpecifier.restore()
+		}
 		registerRedo()
 	}