DOC: Fixed formatting in README_SETUP.md

README_SETUP.md

@@ -198,8 +198,9 @@ Stand-alone documentation is built using Sphinx: `make doc`
 - sphinx
 - javasphinx :: `pip3 install --user javasphinx`
   - Alternative, if javasphinx fails because python3-sphinx is too recent:
-  (`_l` not found):
-  ```
+    (`l_` not found):
+
+    ```sh
 git clone git@github.com:simgrid/javasphinx.git
 cd javasphinx
 git checkout 659209069603a