Use if-let shorthands

Author: fwcd

Diff for: Sources/D2/D2.swift

@@ -70,7 +70,7 @@ struct D2: ParsableCommand {
         let actualInitialPresence = (config?.setPresenceInitially ?? true) ? initialPresence ?? "\(commandPrefix)help" : nil
         let tokens = try DiskJsonSerializer().readJson(as: PlatformTokens.self, fromFile: "local/platformTokens.json")
 
-        if let config = config {
+        if let config {
             log.info("\(config)")
         }
 

Diff for: Sources/D2Commands/fun/PartyGameDatabase.swift

@@ -54,7 +54,7 @@ public class PartyGameDatabase {
 
     public func randomNhieStatement(category categoryToFilter: String? = nil) throws -> NeverHaveIEverStatement {
         var query = nhieStatements
-        if let categoryToFilter = categoryToFilter {
+        if let categoryToFilter {
             query = query.where(category == categoryToFilter)
         }
         guard let row = try db.prepare(query.order(Expression<Int>.random()).limit(1)).makeIterator().next() else {

Diff for: Sources/D2Commands/game/chess/ChessState.swift

@@ -26,9 +26,9 @@ public struct ChessState: GameState, FinitePossibleMoves {
     /// A very simple evaluation from the perspective of the current role
     /// that only takes the players' pieces' values into account.
     public var evaluation: Double {
-        if let winner = winner {
+        if let winner {
             return (winner == currentRole ? 1 : -1) * Double.infinity
-        } else if let roleInCheck = roleInCheck {
+        } else if let roleInCheck {
             return (roleInCheck == currentRole ? -1 : 1) * 200
         } else {
             let ourValue = Double(board.model.totalValue(for: currentRole))

Diff for: Sources/D2Commands/misc/MessageDatabase.swift

@@ -460,7 +460,7 @@ public class MessageDatabase: MarkovPredictor {
     public func generateMarkovTransitions(text: String? = nil) throws -> Int {
         var count = 0
 
-        if let text = text {
+        if let text {
             let words = text.split(separator: " ").map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }
             if words.count > markovOrder {
                 for i in 0..<(words.count - markovOrder) {

Diff for: Sources/D2NetAPIs/mapquest/MapQuestStaticMap.swift

@@ -39,11 +39,11 @@ public struct MapQuestStaticMap {
             URLQueryItem(name: "locations", value: pins.map(\.description).joined(separator: "||"))
         ]
 
-        if let center = center {
+        if let center {
             query.append(URLQueryItem(name: "center", value: "\(center.latitude),\(center.longitude)"))
         }
 
-        if let defaultMarker = defaultMarker {
+        if let defaultMarker {
             query.append(URLQueryItem(name: "defaultMarker", value: defaultMarker))
         }