pub const ROUNDED: BorderSet;Expand description
PLAIN with rounded corners (╭─╮│╰╯).
The 4 corners (╭╮╰╯) have no glyph in any font this crate bundles; drawing with
ROUNDED through retroglyph_window’s fullest bundled FontChain falls back
to the notdef substitute for those 4 entries (horizontal/vertical are shared with
PLAIN, which CP437 does cover). Supply a font with real corner glyphs to draw this
set as intended.