YAML Validator and Formatter — illustrative example

INPUT
Repair the indentation in this YAML mapping. services should contain two sibling mappings, web and worker:
services:
  web:
    port: 3000
   worker:
     enabled: true

RESULT
services:
  web:
    port: 3000
  worker:
    enabled: true

Both services now share the same indentation level. This fixes the supplied structure; no application-specific schema was provided.

REVIEW
YAML syntax validation is different from validating a specific application's configuration. State the parser and schema assumptions when they matter.

This is a teaching example, not a live execution record.