Tweak RELEASE_NOTES wording.

RELEASE_NOTES

@@ -6,10 +6,10 @@ See the file NEWS for more details.
 * Several new commands have been added to perform the individual srun functions.
   The srun command will continue to exist, but these commands may offer 
   greater clarity and ease of use. 
-  salloc  - Perform a resource allocation (functions like "srun --allocate")
-  sattach - Attach to an existing job (functions like "srun --attach")
-  sbatch  - Submit a batch job (functions like "srun --batch")
-  slaunch - Launch tasks (requires an allocaiton to already exist for the job)  
+  salloc  - Create a job allocation (functions like "srun --allocate")
+  sattach - Attach to an existing job step (functions like "srun --attach")
+  sbatch  - Submit a batch job script (functions like "srun --batch")
+  slaunch - Launch tasks (requires a pre-existing job allocation)
   See the indivual man pages for more information. 
 
 * Permit batch jobs to be requeued ("scontrol requeue <jobid>" or