Merge branch 'fix-elasticsearch-docs-for-envvars' into 'master'

Fix elasticsearch docs: ID=1 sudo ... is ineffective

See merge request !1573

doc/integration/elasticsearch.md

@@ -101,7 +101,7 @@ Indexing is 65.55% complete (6555/10000 projects)
 By default, one job is created for every 300 projects. For large numbers of
 projects, you may wish to increase the batch size, by setting the `BATCH`
 environment variable. You may also wish to consider [throttling](../administration/operations/sidekiq_job_throttling.md)
-the `elastic_batch_project_indexer` queue , as this step can be I/O-intensive.
+the `elastic_batch_project_indexer` queue, as this step can be I/O-intensive.
 
 You can also run the initial indexing synchronously - this is most useful if
 you have a small number of projects, or need finer-grained control over indexing
@@ -121,16 +121,16 @@ If you want to run several tasks in parallel (probably in separate terminal
 windows) you can provide the `ID_FROM` and `ID_TO` parameters:
 
 ```
-ID_FROM=1001 ID_TO=2000 sudo gitlab-rake gitlab:elastic:index_repositories
+sudo gitlab-rake gitlab:elastic:index_repositories ID_FROM=1001 ID_TO=2000
 ```
 
 Where `ID_FROM` and `ID_TO` are project IDs. Both parameters are optional.
 As an example, if you have 3,000 repositories and you want to run three separate indexing tasks, you might run:
 
 ```
-ID_TO=1000 sudo gitlab-rake gitlab:elastic:index_repositories
-ID_FROM=1001 ID_TO=2000 sudo gitlab-rake gitlab:elastic:index_repositories
-ID_FROM=2001 sudo gitlab-rake gitlab:elastic:index_repositories
+sudo gitlab-rake gitlab:elastic:index_repositories ID_TO=1000
+sudo gitlab-rake gitlab:elastic:index_repositories ID_FROM=1001 ID_TO=2000
+sudo gitlab-rake gitlab:elastic:index_repositories ID_FROM=2001
 ```
 
 Sometimes your repository index process `gitlab:elastic:index_repositories` or
@@ -144,7 +144,7 @@ it will check every project repository again to make sure that every commit in
 that repository is indexed, it can be useful in case if your index is outdated:
 
 ```
-UPDATE_INDEX=true ID_TO=1000 sudo gitlab-rake gitlab:elastic:index_repositories
+sudo gitlab-rake gitlab:elastic:index_repositories UPDATE_INDEX=true ID_TO=1000
 ```
 
 You can also use the `gitlab:elastic:clear_index_status` Rake task to force the