The four retry scenarios are driven through a scripted `go` (a POSIX shell script
placed first on PATH) and a PATH with a symlinked git. On Windows neither
harness resolves: the file would not be found through LookPath and would not
execute, and the symlink needs privileges - the tests would either fail or
silently assert nothing. They now skip there with the reason named, instead of
reporting a platform they cannot speak for. `GOOS=windows go vet ./internal/update`
compiles clean; macOS runs them for real.
Sycun
e8df681d9b