いろんなフォントで「hold open」変換
Zen Old Minchohold open
Yusei Magichold open
M PLUS 1hold open
Shippori Antiquehold open
Yuji Maihold open
Dela Gothic Onehold open
DotGothic16hold open
Train Onehold open
Hira Minchohold open
Potta Onehold open
Reggae Onehold open
Stickhold open
Zen Kurenaidohold open
Kosugi Maruhold open
Rampart Onehold open
Hachi Maru Pophold open
New Tegominhold open
RocknRoll Onehold open
Kaisei Decolhold open
「hold open」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
