The number of the jobslot will be available as $PARALLEL_JOBSLOT some time in the future.
https://savannah.gnu.org/bugs/?42041 PARALLEL_JOBSLOT = PARALLEL_SEQ mod Number_of_jobslots. The shorthand for the job number $PARALLEL_SEQ is {#}. What would be a reasonable shorthand for $PARALLEL_JOBSLOT? /Ole
