いろんなフォントで「improper_fraction」変換
Zen Old Minchoimproper_fraction
Yusei Magicimproper_fraction
M PLUS 1improper_fraction
Shippori Antiqueimproper_fraction
Yuji Maiimproper_fraction
Dela Gothic Oneimproper_fraction
DotGothic16improper_fraction
Train Oneimproper_fraction
Hira Minchoimproper_fraction
Potta Oneimproper_fraction
Reggae Oneimproper_fraction
Stickimproper_fraction
Zen Kurenaidoimproper_fraction
Kosugi Maruimproper_fraction
Rampart Oneimproper_fraction
Hachi Maru Popimproper_fraction
New Tegominimproper_fraction
RocknRoll Oneimproper_fraction
Kaisei Decolimproper_fraction
「improper_fraction」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
