いろんなフォントで「corner」変換
Zen Old Minchocorner
Yusei Magiccorner
M PLUS 1corner
Shippori Antiquecorner
Yuji Maicorner
Dela Gothic Onecorner
DotGothic16corner
Train Onecorner
Hira Minchocorner
Potta Onecorner
Reggae Onecorner
Stickcorner
Zen Kurenaidocorner
Kosugi Marucorner
Rampart Onecorner
Hachi Maru Popcorner
New Tegomincorner
RocknRoll Onecorner
Kaisei Decolcorner
「corner」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
