Line Drawing Characters in Xterm
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While line drawing characters are available in xterm, they aren't part
of the ASCII character set.

Accessing them in xterm can be done by loading the character set and
switching the character set in.  You need to switch the original
character set back out when your application quits.

You need to use escape sequences to do this represented as '\e' for
the escape character and '\0nn' for control characters.

$ echo -e "\e(0" # Loads the character set.
$ echo -e "\017" # Shifts in line drawing characters.
$ echo -e "\016" # Shifts out the line drawing characters.

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