いろんなフォントで「square_block」変換
Zen Old Minchosquare_block
Yusei Magicsquare_block
M PLUS 1square_block
Shippori Antiquesquare_block
Yuji Maisquare_block
Dela Gothic Onesquare_block
DotGothic16square_block
Train Onesquare_block
Hira Minchosquare_block
Potta Onesquare_block
Reggae Onesquare_block
Sticksquare_block
Zen Kurenaidosquare_block
Kosugi Marusquare_block
Rampart Onesquare_block
Hachi Maru Popsquare_block
New Tegominsquare_block
RocknRoll Onesquare_block
Kaisei Decolsquare_block
「square_block」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
