When your debugger is telnet circa 1980, non-printable characters are a liability. (You pay for it later, when people who've never seen "...end with <CRLF>.<CRL

When your debugger is telnet circa 1980, non-printable characters are a liability. (You pay for it later, when people who've never seen "...end with <CRLF>.<CRLF>" botch the implementation.)