Function deunicode_with_tofu_cow

pub fn deunicode_with_tofu_cow<'input>(
    s: &'input str,
    custom_placeholder: &str,
) -> Cow<'input, str>

Same as deunicode_with_tofu(), but avoids allocating a new String if not necessary.

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.