Merge branch 'docs/edit-worker-information' into 'master'

Edit of new Worker section

See merge request gitlab-org/gitlab-ce!31992

doc/topics/autodevops/index.md

@@ -587,29 +587,32 @@ procfile exec` to replicate the environment where your application will run.
 #### Workers
 
 Some web applications need to run extra deployments for "worker processes". For
-example it is common in a Rails application to have a separate worker process
+example, it is common in a Rails application to have a separate worker process
 to run background tasks like sending emails.
 
 The [default Helm chart](https://gitlab.com/gitlab-org/charts/auto-deploy-app)
 used in Auto Deploy [has support for running worker
 processes](https://gitlab.com/gitlab-org/charts/auto-deploy-app/merge_requests/9).
 
-In order to run a worker you'll need to ensure that it is able to respond to
-the standard health checks which expect a successful HTTP response on port
-`5000`. For sidekiq you could make use of the
-[sidekiq_alive gem](https://rubygems.org/gems/sidekiq_alive) to do this. 
+In order to run a worker, you'll need to ensure that it is able to respond to
+the standard health checks, which expect a successful HTTP response on port
+`5000`. For [Sidekiq](https://github.com/mperham/sidekiq), you could make use of
+the [`sidekiq_alive` gem](https://rubygems.org/gems/sidekiq_alive) to do this.
 
-In order to work with sidekiq you'll also need to ensure your deployments have
-access to a redis instance. Auto DevOps won't deploy this for you so you'll
-need to manage this separately and then set a CI variable
-`K8S_SECRET_REDIS_URL` which the URL of this instance to ensure it's passed
-into your deployments.
+In order to work with Sidekiq, you'll also need to ensure your deployments have
+access to a Redis instance. Auto DevOps won't deploy this for you so you'll
+need to:
 
-Once you have configured your worker to respond to health checks you you will
+- Maintain your own Redis instance.
+- Set a CI variable `K8S_SECRET_REDIS_URL`, which the URL of this instance to
+  ensure it's passed into your deployments.
+
+Once you have configured your worker to respond to health checks, you will
 need to configure a CI variable `HELM_UPGRADE_EXTRA_ARGS` with the value
-`--values helm-values.yaml`. Then you can, for example, run a
-[sidekiq](https://github.com/mperham/sidekiq) worker for your rails application
-by adding a file named `helm-values.yaml` to your repo with the following
+`--values helm-values.yaml`.
+
+Then you can, for example, run a Sidekiq worker for your Rails application
+by adding a file named `helm-values.yaml` to your repository with the following
 content:
 
 ```yml