Docs updated

Author: spirali

CHANGELOG.md

@@ -6,7 +6,7 @@
 
 ### New features
 
-* New command `hq task explain <job_id> <task_id> <worker_ids>` explains why a task cannot be run on a given worker.
+* New command `hq task explain <job_id> <task_id>` explains why a task cannot be run on a given worker.
 * The server scheduler now slightly prioritizes tasks from older jobs and finishing partially-computed task graphs
 * New values for `--crash-limit`:
   * `never-restart` - task is never restarted, even if it "crashes" on a worker that was explicitly terminated.

docs/jobs/explain.md

@@ -3,9 +3,9 @@ this purpose, there is an `explain` command in HQ.
 
 It can be used as follows:
 
-`hq task explain <JOB_ID> <TASK_ID> <WORKER_IDS>`
+`hq task explain <JOB_ID> <TASK_ID>`
 
-This command provides information about whether the given task can run on the specified workers.
+This command provides information about whether the given task can run on workers.
 If it cannot run, it returns explanation why. The explanation considers the following areas:
 
 * Resources