[mod] implement ljf comment

src/yunohost/app.py

@@ -173,9 +173,7 @@ def app_list(filter=None, raw=False, installed=False, with_backup=False):
     for applist in applists:
         with open(os.path.join(REPO_PATH, applist + '.json')) as json_list:
             for app, info in json.load(json_list).items():
-                if app in app_dict:
-                    continue
-
+                if app not in app_dict:
                     info['repository'] = applist
                     app_dict[app] = info