Fix fold for Busybox tests (other than unicode)
Fix fold for Busybox tests (other than unicode)

mauricio/coreutils,kball/coreutils,beni55/coreutils,Shir0kamii/coreutils,mauricio/coreutils,kwantam/coreutils,Heather/coreutils,Gianbaoluo/coreutils,dokaptur/coreutils,Arcterus/coreutils,uutils/coreutils,tempbottle/coreutils,kwantam/coreutils,dbrgn/coreutils,Arcterus/coreutils,uutils/coreutils,bundai223/coreutils,polapl/coreutils,silvio/rust-coreutils,jbcrail/coreutils,jbcrail/coreutils,Gianbaoluo/coreutils,hexsel/coreutils,samfoo/coreutils,dennis/coreutils,steveklabnik/coreutils,hexsel/coreutils,retep998/coreutils,efuquen/coreutils,keunwoo/coreutils,dennis/coreutils,Shtong/coreutils,retep998/coreutils,sshling/coreutils,kevgeniy/coreutils,steveklabnik/coreutils,uutils/coreutils,ebfe/coreutils,sshling/coreutils,bundai223/coreutils,polapl/coreutils,kball/coreutils,efuquen/coreutils,keunwoo/coreutils,dbrgn/coreutils,wimh/coreutils,ebfe/coreutils,dbrgn/coreutils,filmor/coreutils,wimh/coreutils,Heather/coreutils,Shtong/coreutils,silvio/rust-coreutils,samfoo/coreutils,filmor/coreutils,kevgeniy/coreutils,tempbottle/coreutils,beni55/coreutils,Shir0kamii/coreutils