The code changes in `.gitignore` modify the exclusion rule for `go.sum` file, removing the `#` symbol to include it in version control. This change ensures that the `go.sum` file is tracked and synchronized across different environments, improving dependency management and ensuring consistent builds.
The code changes in `aviation_parser_test.go` update the ARR body parsing logic. The `ParseHeader` function now correctly handles ARR bodies with optional time components. This ensures accurate parsing of ARR bodies and improves the overall functionality of the aviation parser.
windyboy