>>46
Pretty sure UNIX has handled text line-by-line for decades. Run
cat, type ``hello'', hit Return, it prints ``hello''.
The original ``cat -v'' paper (hosted on the site at
http://harmful.cat-v.org/cat-v/unix_prog_design.pdf) recommends writing a separate program,
vis, whose job it is to print non-visible characters. This way it can be used in conjunction with
any program, not just
cat.