title: How do I solve this ? Mapping values are not allowed in this context
body: <p>I am trying to use prometheus and blackbox exporter to monitor something. Here is my prometheus.yml file.  And this is the error I got: <code>
  couldn't load configuration (--config.file=\"/etc/prometheus/prometheus.yml\"): parsing YAML file /etc/prometheus/prometheus.yml: yaml: line 9: mapping values are not allowed in this context</code></p>
  
  <pre><code>global:
   scrape_interval:     15s
   evaluation_interval: 15s
  scrape_configs:
    - job_name: 'prometheus'
      static_configs:
        - targets: ['localhost:9090']
    - job_name: blackbox
            metrics_path:
            params:
              module: [http_2xx]
       static_configs:
              - targets:
                - https://www.robustperception.io/
                - http://prometheus.io/blog
                - http://yourdomain/usage-api/health
                - http://yourdomain/google-apm/health
                - https://google.com
                - https://www.telegraph.co.uk
            relabel_configs:
              - source_labels: [__address__]
              target_label: __param_target
              - source_labels: [__param_target]
  </code></pre>