いろんなフォントで「double_standard」変換
Zen Old Minchodouble_standard
Yusei Magicdouble_standard
M PLUS 1double_standard
Shippori Antiquedouble_standard
Yuji Maidouble_standard
Dela Gothic Onedouble_standard
DotGothic16double_standard
Train Onedouble_standard
Hira Minchodouble_standard
Potta Onedouble_standard
Reggae Onedouble_standard
Stickdouble_standard
Zen Kurenaidodouble_standard
Kosugi Marudouble_standard
Rampart Onedouble_standard
Hachi Maru Popdouble_standard
New Tegomindouble_standard
RocknRoll Onedouble_standard
Kaisei Decoldouble_standard
「double_standard」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
