append negative squared letters to mathematical fonts

A, B, and AB indicate blood types, and are supported
as :x: campfire/github/&c emoticon entities.

diff --git a/unicode.txt b/unicode.txt
index 057a409f1306ebf72a0216a686d476d8677964a3..42a48b1cfe6b61da45bc37860ffdbbe06eb811bd 100644 (file)
--- a/unicode.txt
+++ b/unicode.txt
@@ -27,7 +27,7 @@ Mathematics and sciences:
                                             ⎪⎢⎜ ⎳aⁱ-bⁱ⎟⎥⎪
   2H₂ + O₂ ⇌ 2H₂O, R = 4.7 kΩ, ⌀ 200 mm     ⎩⎣⎝i=1    ⎠⎦⎭
 
-  ⒶⒷⒸ 𝐀𝐁𝐂 𝐴𝐵𝐶 𝑨𝑩𝑪 𝒜ℬ𝒞 𝓐𝓑𝓒 𝔄𝔅ℭ 𝔸𝔹ℂ 𝕬𝕭𝕮 𝖠𝖡𝖢 𝗔𝗕𝗖 𝘈𝘉𝘊 𝘼𝘽𝘾 𝙰𝙱𝙲
+  ⒶⒷⒸ 𝐀𝐁𝐂 𝐴𝐵𝐶 𝑨𝑩𝑪 𝒜ℬ𝒞 𝓐𝓑𝓒 𝔄𝔅ℭ 𝔸𝔹ℂ 𝕬𝕭𝕮 𝖠𝖡𝖢 𝗔𝗕𝗖 𝘈𝘉𝘊 𝘼𝘽𝘾 𝙰𝙱𝙲 🅰🅱🆎
 
 Compact font overview: