Worked on the nushell/nushell repository to address a key issue in string expansion, specifically refining the handling of zero-padding in numeric ranges. Focused on ensuring that zero is only used as a padding character when the range explicitly starts at zero, this update improved the accuracy and predictability of outputs such as {00..10}. The solution involved careful string manipulation and comprehensive testing using Rust, aligning the command’s behavior with documented expectations and reducing potential user confusion. Release notes were updated to clearly communicate the change, reflecting a methodical approach to both code quality and user-facing documentation.