Function deunicode::deunicode_with_tofu

pub fn deunicode_with_tofu(s: &str, custom_placeholder: &str) -> String

Same as deunicode(), but unknown characters can be replaced with a custom string.

You can use “\u{FFFD}” to use the usual Unicode Replacement Character.

“Tofu” is a nickname for a replacement character, which in Unicode fonts usually looks like a block of tofu.