fix cat example by flushing stdout at end
fix cat example by flushing stdout at end

raulgrell/zig,zig-lang/zig,zig-lang/zig,raulgrell/zig,andrewrk/zig,Dimenus/zig,raulgrell/zig,raulgrell/zig,Dimenus/zig,andrewrk/zig,zig-lang/zig,raulgrell/zig,Dimenus/zig