In case no file in dir, still an empty string will be read, which matches [[:digit:]]* (but won't with +)
In case no file in dir, still an empty string will be read, which matches [[:digit:]]* (but won't with +)

YunoHost/yunohost,YunoHost/yunohost,YunoHost/yunohost,YunoHost/moulinette-yunohost,YunoHost/moulinette-yunohost,YunoHost/moulinette-yunohost,YunoHost/moulinette-yunohost,YunoHost/moulinette-yunohost,YunoHost/yunohost