[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

aiida_hyperqueue/cli/alloc.py

@@ -61,7 +61,7 @@ def cmd_add(
     with computer.get_transport() as transport:
         retval, _, stderr = transport.exec_command_wait(
             f'hq alloc add slurm --backlog {backlog} --time-limit {time_limit} --name aiida {hyper} '
-            f'--workers-per-alloc {workers_per_alloc} -- {" ".join(slurm_options)}'
+            f'--workers-per-alloc {workers_per_alloc} -- {' '.join(slurm_options)}'
         )
 
     if retval != 0: