fn indentation(config: &PrettyPrintConfig) -> (String, String, String) {
    if config.should_indent {
        (
            " ".repeat((config.indent - 2) as usize),
            " ".repeat(config.indent as usize),
            "\n".to_string(),
        )
    } else {
        ("".to_string(), "".to_string(), "".to_string())
    }
}
Returns strings used for indentation.

Specifically, this function returns three strings: one representating the indented level of the
current configuration, one to represent one indent level lower, and one representing a newline
character.
weld/src/ast/pretty_print.rs