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pub trait RemoveDuplicateSpaces {
    fn remove_duplicate_spaces(self) -> Self;
}

pub trait Indent {
    fn indent(self, number: usize) -> Self;
}

impl RemoveDuplicateSpaces for String {
    fn remove_duplicate_spaces(self) -> Self {
        let mut replaced = self;
        while replaced.contains("  ") {
            replaced = replaced.replace("  ", " ");
        }
        replaced
    }
}

impl Indent for String {
    fn indent(self, number: usize) -> Self {
        let mut padding = "".to_string();
        for _ in 0..number {
            padding = format!(" {}", padding);
        }
        let lines: Vec<String> = self.lines().map(|l| format!("{}{}", padding, l)).collect();
        lines.join("\n")
    }
}