varをletに変更

diff --git a/KCD/DeckBuilder.swift b/KCD/DeckBuilder.swift
index f41c401..430db8f 100644 (file)
--- a/KCD/DeckBuilder.swift
+++ b/KCD/DeckBuilder.swift
@@ -20,8 +20,7 @@ final class DeckBuilder {
     func openDeckBuilder() {
         
         // use for encodeURIComponent() of Javascript
-        var characterSet = CharacterSet.alphanumerics
-        characterSet.insert(charactersIn: "-_.!~*'()")
+        let characterSet = CharacterSet.alphanumerics.union(CharacterSet(charactersIn: "-_.!~*'()"))
         
         let desc = structure.deckDescription