Type Alias RemoveRepeatedSeparator<NotValidated, Validated>

RemoveRepeatedSeparator: NotValidated extends `${infer Ch}${infer Rest}`
    ? IsRepeatedSeparator<Ch, Validated> extends true
        ? RemoveRepeatedSeparator<Rest, Validated>
        : RemoveRepeatedSeparator<Rest, `${Validated & string}${Ch}`>
    : Validated

Removes repeated separator characters from a string literal type. Ensures consecutive separators are treated as a single separator.