* initial pass at untracked file changes, testing next
* add final trailing \n
* unit tests for function
* fix test execution
* tweak some comments and formattting
* another comment tweak after testing
* small change to handling fully empty files
* copilot PR feedback
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Co-authored-by: Ian Huff <ianhuff@Ians-MacBook-Pro-2.local>
Co-authored-by: Ian Huff <ianhuff@Mac.home>