add broken test case which reorders and separates imports

We split into three groups rather than two.
Fixing this right now is tricky, due to go/ast positions.
However, we can add the test case to increase test coverage,
and to ensure that we don't lose the reproducer.

For #225.

testdata/script/std-imports.txtar

@@ -90,6 +90,15 @@ import (
 
 	"nodomainother/mod.withdot/pkg1"
 )
+
+// TODO: fix issue 225.
+import (
+	"path/filepath"
+	"time"
+	"github.com/tinkerbell/tink/pkg/apis/core/v1alpha1"
+	"k8s.io/apimachinery/pkg/types"
+	"sigs.k8s.io/yaml"
+)
 -- foo.go.golden --
 package p
 
@@ -171,3 +180,14 @@ import (
 	"io"
 	"nodomainother/mod.withdot/pkg1"
 )
+
+// TODO: fix issue 225.
+import (
+	"path/filepath"
+	"time"
+
+	"github.com/tinkerbell/tink/pkg/apis/core/v1alpha1"
+	"k8s.io/apimachinery/pkg/types"
+
+	"sigs.k8s.io/yaml"
+)