[golang/go] cmd/go: TestScript/cover_pkgall_runtime failures

### ROOT CAUSE The issue arises because the test command `go test -coverpkg=all x` includes an extra argument 'x', which is not a valid package. This causes the test to fail or behave unexpectedly since the coverage package 'all' isn't processed correctly. ### CODE FIX To fix this, ensure the command in the test runs without the extra argument. Modify the test to execute `go test -coverpkg=all` instead.

// In script_test.go, update the command to remove the 'x' argument.
// Ensure the test runs without extra parameters to properly test coverage functionality.


bash
// Example fix: Change the executed command to only include -coverpkg=all
go test -coverpkg=all