いろんなフォントで「serial_port」変換
Zen Old Minchoserial_port
Yusei Magicserial_port
M PLUS 1serial_port
Shippori Antiqueserial_port
Yuji Maiserial_port
Dela Gothic Oneserial_port
DotGothic16serial_port
Train Oneserial_port
Hira Minchoserial_port
Potta Oneserial_port
Reggae Oneserial_port
Stickserial_port
Zen Kurenaidoserial_port
Kosugi Maruserial_port
Rampart Oneserial_port
Hachi Maru Popserial_port
New Tegominserial_port
RocknRoll Oneserial_port
Kaisei Decolserial_port
「serial_port」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
