test: accept differently formatted output

The default for Node.js's `util.inspect` `compact` option might soon
change to `3` which slightly changes the default output for objects.
This change accepts both formats so that the test passes in all Node.js
versions.

Refs: nodejs/node#27109

test/yargs.js

@@ -522,7 +522,7 @@ describe('yargs dsl tests', () => {
  builder (yargs) { return yargs },
  handler (argv) {}
  })
- }).to.throw(/No command name given for module: { desc: 'A command with no name',\n {2}builder: \[Function(: builder)?],\n {2}handler: \[Function(: handler)?] }/)
+ }).to.throw(/No command name given for module: {(\n )? desc: 'A command with no name',\n {2}builder: \[Function(: builder)?],\n {2}handler: \[Function(: handler)?](\n| )}/)
  })
  })