/usr/share/doc/brltty/XWindow.README.UBraille is in brltty 5.4-7+deb9u1.
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1 2 3 | UBraille.ttf is a set of true type font glyphs for the Unicode braille range
[U+28yx]. It was developed by Vyacheslav Dikonov <sdiconov@mail.ru>, and can be
downloaded from: http://yudit.org/download/fonts/UBraille/
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