changing error message to not include newline

Author: vsoch

cmd/root_test.go

@@ -33,9 +33,8 @@ type testpair struct {
 func TestCacheDir(t *testing.T) {
 homeDir, err := homedir.Dir()
 if err != nil {
-t.Errorf("\nError getting home dir")
+t.Errorf("error getting home dir: %s", err.Error())
 }
-
 tests := []struct {
 name string
 cliFlag string