Update README.md

Author: arsLibera

README.md

@@ -103,21 +103,25 @@ pytest Tests/SystemTests --relativeExePath="../svOneDSolver_build/bin/OneDSolver
 If the binary is in a different location, specify the correct location.
 
 <details>
+<summary>Running system tests in parallel</summary>
+<br>
 
-  <summary>Running system tests in parallel</summary>
-    This offers some details for how to set up a python environment and install the relevant packages on linux, and then run the tests in parallel. Note that depending on the OS this setup process will vary, but the basic steps will remain the same.
+This offers some details for how to set up a python environment and install the relevant packages on linux, and then run the tests in parallel. Note that depending on the OS this setup process will vary, but the basic steps will remain the same.
 
-    Navigate to the source folder, and run the following:
-```sudo apt install python3-venv
+Navigate to the source folder, and run the following:
+    
+```
+sudo apt install python3-venv
 python3 -m venv venv
 source venv/bin/activate
 pip install numpy pytest-xdist
 ```
 
-    With `xdist` available, run the tests in parallel (`-n <number of cores>`).
-```pytest Tests/SystemTests --relativeExePath="../svOneDSolver_build/bin/OneDSolver" -n 6
+With `xdist` available, run the tests in parallel (`-n <number of cores>`).
+    
+```
+pytest Tests/SystemTests --relativeExePath="../svOneDSolver_build/bin/OneDSolver" -n auto
 ```
-
 </details>