Bug#1109472: xterm: display issue: dots in the bottom line due to box drawings vertical line

[Vincent Lefevre]

Control: found -1 379-1

This already occurs with an xterm on a bookworm machine
(current stable).

-- 
Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)