pub const THICK: LineSet;Expand description
Heavy (thick) gridline characters (━┃╋┫┣┳┻).
horizontal/vertical are the same glyphs as super::border::THICK’s and share its notdef
gap. The 4 tees and the cross (┫┣┳┻╋) have no glyph in any font this crate bundles
either; drawing with THICK through retroglyph_window’s fullest bundled
FontChain falls back to the notdef substitute for all 7 entries. Supply a font
with real heavy-line glyphs to draw this set as intended.