Merge branch '276-wrong-formatting-in-python_virtual_environments-md' into 'preview'

fix formatting

Closes #276

See merge request !498

doc.zih.tu-dresden.de/docs/software/python_virtual_environments.md

@@ -190,8 +190,7 @@ below.
     - 'shapely=1.7.1'
     - pip:
         - python-hll
-
-```
+    ```
 
 After specifying the `name`, the conda [channel priority](https://docs.conda.io/projects/conda/en/latest/user-guide/concepts/channels.html)
 is defined. In the example above, packages will be first installed from the