symbol "," matchs all non-alphabetic characters like "_" or "(".

[xdidi3r]

In the latest version, i found the symbol "," matchs all the characters except letter.

[hong]

Yes, but this is intentionally designed,
Because some non-alphabetic characters are not easy to type. such as '\', '|', '^', '}', etc.

[xdidi3r]

thanks！