Update job-submission-and-execution.md fixed typo

docs.it4i/general/job-submission-and-execution.md

@@ -159,7 +159,7 @@ $ qsub -A OPEN-0-0 -q qprod -l select=1:ncpus=16:host=cn171+1:ncpus=16:host=cn17
 ```
 
 ```console
-qsub -A OPEN-0-0 -q qprod -l select=1:ncpus=24:host=r24u35n680+1:ncpus=24:host=r24u36n681 -I
+$ qsub -A OPEN-0-0 -q qprod -l select=1:ncpus=24:host=r24u35n680+1:ncpus=24:host=r24u36n681 -I
 ```
 
 In this example, we allocate nodes cn171 and cn172, all 16 cores per node, for 24 hours.  Consumed resources will be accounted to the Project identified by Project ID OPEN-0-0. The resources will be available interactively.