update cat for current Rust syntax with ugly errors handling
update cat for current Rust syntax with ugly errors handling

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