From b65595d0b7eea175bf20a5bce731fb9732e35d9a Mon Sep 17 00:00:00 2001
From: Adrien Waksberg <git@yae.im>
Date: Sun, 9 Apr 2017 08:47:07 +0200
Subject: [PATCH] minor refacto

---
 lib/mpw/mpw.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mpw/mpw.rb b/lib/mpw/mpw.rb
index c6a5cf0..896339c 100644
--- a/lib/mpw/mpw.rb
+++ b/lib/mpw/mpw.rb
@@ -93,7 +93,7 @@ module MPW
         end
       end
 
-      add_key(@key) if @keys[@key].nil?
+      add_key(@key) unless @keys.key?(@key)
     rescue => e
       raise "#{I18n.t('error.mpw_file.read_data')}\n#{e}"
     end