fix(template): trim trailing newline from rendered manifests to match v4.1.x stdout output

pkg/action/action.go

@@ -355,7 +355,7 @@ func (cfg *Configuration) renderResources(ctx context.Context, ch *chart.Chart,
 					if strings.TrimSpace(content) == "" {
 						continue
 					}
-					fmt.Fprintf(b, "---\n# Source: %s\n%s\n", name, content)
+					fmt.Fprintf(b, "---\n# Source: %s\n%s\n", name, strings.TrimRight(content, "\n"))
 				}
 				return hs, b, "", err
 			}
@@ -484,7 +484,7 @@ func (cfg *Configuration) renderResources(ctx context.Context, ch *chart.Chart,
 	if includeCrds {
 		for _, crd := range ch.CRDObjects() {
 			if outputDir == "" {
-				fmt.Fprintf(b, "---\n# Source: %s\n%s\n", crd.Filename, string(crd.File.Data))
+				fmt.Fprintf(b, "---\n# Source: %s\n%s\n", crd.Filename, strings.TrimRight(string(crd.File.Data), "\n"))
 			} else {
 				err = writeToFile(outputDir, crd.Filename, string(crd.File.Data), fileWritten[crd.Filename])
 				if err != nil {
@@ -500,7 +500,7 @@ func (cfg *Configuration) renderResources(ctx context.Context, ch *chart.Chart,
 			if hideSecret && m.Head.Kind == "Secret" && m.Head.Version == "v1" {
 				fmt.Fprintf(b, "---\n# Source: %s\n# HIDDEN: The Secret output has been suppressed\n", m.Name)
 			} else {
-				fmt.Fprintf(b, "---\n# Source: %s\n%s\n", m.Name, m.Content)
+				fmt.Fprintf(b, "---\n# Source: %s\n%s\n", m.Name, strings.TrimRight(m.Content, "\n"))
 			}
 		} else {
 			newDir := outputDir