Move configuration reports to shared rendering

integrations/ckconfig/diff_execution_test.go

@@ -60,7 +60,7 @@ func TestConfigDiffExecutesWithDefaultAndExplicitYAMLAndInheritedSelections(t *t
 	loadsBeforeText := len(selections)
 	output.Reset()
 	outcome = app.Execute(context.Background(), []string{"config", "diff", "--format", "text"}, commandkit.Streams{Out: &output, Err: io.Discard})
-	if outcome.Kind != commandkit.OutcomeUsage || len(selections) != loadsBeforeText || output.Len() != 0 {
+	if outcome.Kind != commandkit.OutcomeSuccess || len(selections) != loadsBeforeText+2 || !strings.Contains(output.String(), "deletions:") {
 		t.Fatalf("text format outcome/work/output = %#v / %d / %q", outcome, len(selections)-loadsBeforeText, output.String())
 	}
 }