いろんなフォントで「double up」変換
Zen Old Minchodouble up
Yusei Magicdouble up
M PLUS 1double up
Shippori Antiquedouble up
Yuji Maidouble up
Dela Gothic Onedouble up
DotGothic16double up
Train Onedouble up
Hira Minchodouble up
Potta Onedouble up
Reggae Onedouble up
Stickdouble up
Zen Kurenaidodouble up
Kosugi Marudouble up
Rampart Onedouble up
Hachi Maru Popdouble up
New Tegomindouble up
RocknRoll Onedouble up
Kaisei Decoldouble up
「double up」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
