記号ではここら辺が使えるっぽい
safe = "$" | "-" | "_" | "." | "+"
extra = "!" | "*" | "'" | "(" | ")" | ","
この中なら "." かなあ?
"(" や ")" は本当に使えるのかな?
safe = "$" | "-" | "_" | "." | "+"
extra = "!" | "*" | "'" | "(" | ")" | ","
この中なら "." かなあ?
"(" や ")" は本当に使えるのかな?