fix: align cli output tests and help examples

src/cli/help-format.ts

@@ -1,6 +1,6 @@
 import { theme } from "../terminal/theme.js";
 
-export type HelpExample = [command: string, description: string];
+export type HelpExample = readonly [command: string, description: string];
 
 export function formatHelpExample(command: string, description: string): string {
   return `  ${theme.command(command)}\n    ${theme.muted(description)}`;
@@ -11,11 +11,15 @@ export function formatHelpExampleLine(command: string, description: string): str
   return `  ${theme.command(command)} ${theme.muted(`# ${description}`)}`;
 }
 
-export function formatHelpExamples(examples: HelpExample[], inline = false): string {
+export function formatHelpExamples(examples: ReadonlyArray<HelpExample>, inline = false): string {
   const formatter = inline ? formatHelpExampleLine : formatHelpExample;
   return examples.map(([command, description]) => formatter(command, description)).join("\n");
 }
 
-export function formatHelpExampleGroup(label: string, examples: HelpExample[], inline = false) {
+export function formatHelpExampleGroup(
+  label: string,
+  examples: ReadonlyArray<HelpExample>,
+  inline = false,
+) {
   return `${theme.muted(label)}\n${formatHelpExamples(examples, inline)}`;
 }