mdtablefix 0.3.1

`mdtablefix` unb0rks and reflows Markdown tables so that each column has a uniform width. When the `--wrap` option is used, it also wraps paragraphs and list items to 80 columns.
Documentation 
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//! Replace sequences of three dots with the ellipsis character.
//!
//! Groups of three consecutive dots become a single Unicode ellipsis. Longer
//! runs are processed left-to-right so trailing dots that do not form a
//! complete triple remain. Fenced code blocks and inline code spans are left
//! untouched.

use std::sync::LazyLock;

use regex::Regex;

use crate::textproc::{Token, process_tokens, push_original_token};

static DOT_RE: LazyLock<Regex> = lazy_regex!(r"\.{3,}", "ellipsis pattern regex should compile");

/// Replace `...` with `…` outside code spans and fences.
#[must_use]
pub fn replace_ellipsis(lines: &[String]) -> Vec<String> {
    process_tokens(lines, |tok, out| match tok {
        Token::Text(t) => {
            if !DOT_RE.is_match(t) {
                out.push_str(t);
                return;
            }
            let replaced = DOT_RE.replace_all(t, |caps: &regex::Captures<'_>| {
                let len = caps[0].len();
                let ellipses = "…".repeat(len / 3);
                let leftover = ".".repeat(len % 3);
                format!("{ellipses}{leftover}")
            });
            out.push_str(&replaced);
        }
        _ => push_original_token(&tok, out),
    })
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn replaces_simple_text() {
        let input = vec!["wait...".to_string()];
        let expected = vec!["wait…".to_string()];
        assert_eq!(replace_ellipsis(&input), expected);
    }

    #[test]
    fn ignores_code_spans() {
        let input = vec!["a `b...` c".to_string()];
        let expected = input.clone();
        assert_eq!(replace_ellipsis(&input), expected);
    }

    #[test]
    fn ignores_fenced_blocks() {
        let input = vec!["```".to_string(), "...".to_string(), "```".to_string()];
        let expected = input.clone();
        assert_eq!(replace_ellipsis(&input), expected);
    }

    #[test]
    fn replaces_long_sequences() {
        let input = vec![".... ..... ...... .......".to_string()];
        let expected = vec!["…. ….. …… …….".to_string()];
        assert_eq!(replace_ellipsis(&input), expected);
    }

    #[test]
    fn handles_empty_input() {
        let input: Vec<String> = Vec::new();
        let expected: Vec<String> = Vec::new();
        assert_eq!(replace_ellipsis(&input), expected);
    }

    #[test]
    fn handles_multiple_fenced_blocks() {
        let input = vec![
            "text...".to_string(),
            "```".to_string(),
            "code...".to_string(),
            "```".to_string(),
            "more text...".to_string(),
        ];
        let expected = vec![
            "text…".to_string(),
            "```".to_string(),
            "code...".to_string(),
            "```".to_string(),
            "more text…".to_string(),
        ];
        assert_eq!(replace_ellipsis(&input), expected);
    }
}