Method advance_n

crates/gitql-parser/src/tokenizer.rs:796–799

(&mut self, n: usize)

    }

    fn advance_n(&mut self, n: usize) {
        self.index += n;
        self.column_end += n as u32;
    }

    fn is_current_char(&self, ch: char) -> bool {
        self.index < self.content_len && self.content[self.index] == ch