Merge pull request apache#82 from mesosphere/python-docs

--py-files documentation

Author: mgummelt

docs/user-docs.md

@@ -515,19 +515,19 @@ more][13].
 
     Or, for a Python job
 
-        $ dcos spark run --submit-args="http://external.website/mysparkapp.py 30"
+        $ dcos spark run --submit-args="--py-files mydependency.py http://external.website/mysparkapp.py 30"
 
-    `dcos spark run` is a thin wrapper around the standard Spark
+`dcos spark run` is a thin wrapper around the standard Spark
 `spark-submit` script. You can submit arbitrary pass-through options
 to this script via the `--submit-args` options.
 
-    The first time you run a job, the CLI must download the Spark
+The first time you run a job, the CLI must download the Spark
 distribution to your local machine. This may take a while.
 
-    If your job runs successfully, you will get a message with the
+If your job runs successfully, you will get a message with the
 job’s submission ID:
 
-        Run job succeeded. Submission id: driver-20160126183319-0001
+    Run job succeeded. Submission id: driver-20160126183319-0001
 
 1.  View the Spark scheduler progress by navigating to the Spark
 dispatcher at `http://<dcos-url>/service/spark/`