Update tools.md

content/tools.md

@@ -281,11 +281,11 @@ The main page is in [this link](https://jupyter.org/). Also see [documentation](
 
   one needs to set up port-forwarding in order to connect a session on a LEONARDO login node to ones local computer. For example, on the login node one can start
 
-     jupyter-lab --no-browser
+      jupyter-lab --no-browser
 
    and it will output a link which can be used for a browser. In this information, a specific port is shown. Now, one needs to on the local computer set up a port-forwarding which may look like
 
-    ssh -N -f -L localhost:YYYY:localhost:YYYY [email protected]
+     ssh -N -f -L localhost:YYYY:localhost:YYYY [email protected]
 
   here, one fills in the port YYYY, USERNAME, and specific login node NN where jupyter-lab is started. If the port-forwarding is successful, then it's possible to open the session in ones browser on the local computer. Though, this recipe didn't work for my local computer.