* Fix shape of heavy-weight serifed Latin C With Hook, Epsilons (#1580).
* Fix heavy-weight ampersand's top arc alignment (#1581).
* Fix shape of heavy-weight lowercase r (#1582).
* Optimize shape for Sulzbacher Eszet (#1583).
* Fix missing serifs of Cyrillic Koppa (#1584).
* Fix shape of heavy-weight Rs (#1585).
* Fix shape of Latin Small Letter Y with Hook under heavy weights (#1588, #1589).
* Fix shape of Bashkir Ka under heavy weights (#1590).
* Fix artifacts of certain K-related letters (#1591).
* Optimize shape of small S (#1592).
- Whether notches are added are controlled by variant system (#1537).
- Added separate variant selectors to control whether to add notches to arrow bars.
- LATIN CAPITAL LETTER REVERSED C WITH DOT (`U+A73E`).
- LATIN SMALL LETTER REVERSED C WITH DOT (`U+A73F`).
- LATIN CAPITAL LETTER O WITH LONG STROKE OVERLAY (`U+A74A`).
- LATIN SMALL LETTER O WITH LONG STROKE OVERLAY (`U+A74B`).
- LATIN CAPITAL LETTER INSULAR G (`U+A77D`) (#1483, #1489).
- LATIN CAPITAL LETTER TURNED INSULAR G (`U+A77E`) (#1483, #1489).
- LATIN SMALL LETTER TURNED INSULAR G (`U+A77F`) (#1483, #1489).
- LATIN CAPITAL LETTER REVERSED HALF H (`U+A7F5`) (#1490).
- LATIN SMALL LETTER REVERSED HALF H (`U+A7F6`) (#1490).
- LATIN LETTER SMALL CAPITAL TURNED M (`U+A7FA`) (#1490).
- LATIN SMALL LETTER C WITH PALATAL HOOK (`U+A794`) (#1478).
- LATIN SMALL LETTER H WITH PALATAL HOOK (`U+A795`) (#1478).
- LATIN CAPITAL LETTER C WITH PALATAL HOOK (`U+A7C4`) (#1478).
- LATIN CAPITAL LETTER Z WITH PALATAL HOOK (`U+A7C6`) (#1478).
* Add cursive variants for LATIN SMALL LETTER V WITH PALATAL HOOK (`U+1D8C`) (#1480).
* Fix variant selector for CYRILLIC SMALL LETTER KA WITH STROKE (`U+049F`) (#1481).
* Fix shape of LATIN SMALL LETTER P WITH PALATAL HOOK (`U+1D88`) (#1472).
* Fix shape of LATIN SMALL LETTER OPEN O WITH RETROFLEX HOOK (`U+1D97`) (#1473).
* Fix bar placement of FRENCH FRANC SIGN (`U+20A3`) (#1474).
* Fix shape of `a` under rounded-tailed variant (#1475).
* Fix shape of LATIN CAPITAL LETTER SMALL Q WITH HOOK TAIL (`U+024A`) under rounded variants (#1476).