RE: How to replace a character by an unprintable character ?

[Drew Adams]

    Using M-% or C-M-% how do you replace each `;' in
    a;b;c;d by a carriage return (<RET>)
    I've tried several things out in the replacement string without
    success :
    
    C-q <RET>

   
`C-q C-m'    (C-m is RETURN.)