- Add support for empty patterns (matches the whole file)
- Add support for negated patterns (e.g. /regex/!)
- Add support for relative (addr,+N) ranges
- Add support for regex ranges (e.g. /start/,/end/ or /start/,+100)
- Add support for uncommenting and toggling comment blocks
- Change default commenting behaviour based on binary name (support for symlink aliases)
- Fix line range behaviour to be inclusive intervals to match sed definition
- Add support for custom comment prefixes
- Add support for simple regular expression patterns
- Add support for piped input on stdin
- Initial release, basic support for adding '#' comments based on line ranges