Lint: Insert space between words

doc.zih.tu-dresden.de/docs/jobs_and_resources/mpi_issues.md

@@ -28,7 +28,7 @@ or setting the option as argument, in case you invoke `mpirun` directly
 mpirun --mca io ^ompio ...
 ```
 
-## Mpirun on partition `alpha`and `ml`
+## Mpirun on partition `alpha` and `ml`
 
 Using `mpirun` on partitions `alpha` and `ml` leads to wrong resource distribution when more than
 one node is involved. This yields a strange distribution like e.g. `SLURM_NTASKS_PER_NODE=15,1`