'cv01' does not apply to all variants of ⟨A⟩

[dscorbett]

'cv01' affects ⟨A⟩ and most characters derived from it, but some variants are missed. U+00C6 and similar characters do get curly variant glyphs, but their serifs are unaffected. Greek capital alphas with two diacritics above get no variant glyphs.

• U+00C6 LATIN CAPITAL LETTER AE
• U+01E2 LATIN CAPITAL LETTER AE WITH MACRON
• U+01FC LATIN CAPITAL LETTER AE WITH ACUTE
• U+04D4 CYRILLIC CAPITAL LIGATURE A IE
• U+1D01 LATIN LETTER SMALL CAPITAL AE
• U+1D2D MODIFIER LETTER CAPITAL AE
• U+1F0A GREEK CAPITAL LETTER ALPHA WITH PSILI AND VARIA
• U+1F0B GREEK CAPITAL LETTER ALPHA WITH DASIA AND VARIA
• U+1F0C GREEK CAPITAL LETTER ALPHA WITH PSILI AND OXIA
• U+1F0D GREEK CAPITAL LETTER ALPHA WITH DASIA AND OXIA
• U+1F0E GREEK CAPITAL LETTER ALPHA WITH PSILI AND PERISPOMENI
• U+1F0F GREEK CAPITAL LETTER ALPHA WITH DASIA AND PERISPOMENI
• U+1F8A GREEK CAPITAL LETTER ALPHA WITH PSILI AND VARIA AND PROSGEGRAMMENI
• U+1F8B GREEK CAPITAL LETTER ALPHA WITH DASIA AND VARIA AND PROSGEGRAMMENI
• U+1F8C GREEK CAPITAL LETTER ALPHA WITH PSILI AND OXIA AND PROSGEGRAMMENI
• U+1F8D GREEK CAPITAL LETTER ALPHA WITH DASIA AND OXIA AND PROSGEGRAMMENI
• U+1F8E GREEK CAPITAL LETTER ALPHA WITH PSILI AND PERISPOMENI AND PROSGEGRAMMENI
• U+1F8F GREEK CAPITAL LETTER ALPHA WITH DASIA AND PERISPOMENI AND PROSGEGRAMMENI

For example, here they are with 'cv01' set to 4.

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• Your font version: 7.0.0-preview.3
• Your font variant: Iosevka Slab Extended
• Your operating system (name and version): macOS 10.14.6
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