chore: Apply whitespace fixes from hooks

- Remove trailing whitespace
- Correct single newline at end of files (skip for json)
- Update to formatting in a few places due to black

help/en/developer/hscommon/jobprogress/job.rst

@@ -4,14 +4,13 @@ hscommon.jobprogress.job
 .. automodule:: hscommon.jobprogress.job
 
     .. autosummary::
-        
+
         Job
         NullJob
-    
+
     .. autoclass:: Job
         :members:
         :private-members:
 
     .. autoclass:: NullJob
         :members:
-