Fix logic to update version when HEAD changes. #10896
Merged
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Fixes #10855.
The loader build.rs tries to determine when HEAD changes,
so it can re-run and update the embedded version.
It was shelling out to do this, and capturing a trailing newline,
so it always thought HEAD did not exist.
I confirmed that if I update helix-term, helix-loader rebuilds and updates the commit hash: