10. A unit as recited in claim 7 wherein: D. said transfer means includes: i. first register means connected to said memory means, ii. second register means connected to said display means, and iii. switch means connected to said first and second register means for coupling to said register means either the contents of said first register means or a code that represents a blank display, and G. said storage means in said delimiter position recording means comprises a second counter means connected to said first counter means and to said delimiter means that is preset to the display position recorded in said first counter means each time said first register means receives a character code for a delimiter character from said memory means, said second counter means being decremented as the character codes are transferred from said first register means to said second register means, said control means being connected to said second counter means and responsive to a value of zero in said second counter means for shifting said switch means from a state wherein said switch means couples character codes from said first register means to a state wherein said switching means couples the blanking codes to said second register means.
7. A unit as recited in claim 6 wherein said detector means comprises a first counter means connected to said timing means for recording the number of characters in said transfer means to be displayed on a line, and said delimiter position recording means includes storage means connected to said first counter means and said delimiter means and responsive to the transfer of each delimiter character to said transfer means for storing a number representing the display position of that delimiter character.