I need to render an ASCII file for printing in a way that removes ambiguity if (very unlikely) one decides to type it in and validate the signatures.
I am giving the 8-bit symbol-set QR code as an alternative, but a manual validation would be a nice addition for archival purposes.
Essentially, I need a monospace typesetter that would typeset a 'blank space' symbol for space, a CR/LF symbol (and proceed to the next line for readability) whenever a CR/LF is encountered, etc., making it obvious if there are any trailing whitespaces before the CR/LF, if there is a character present, etc.
Is there a font that accomplishes that goal? *nix utility? TeX module/package/derived system? I've posted a similar question on TeX.SE, but it might be better suited here.