Virtual-environment.md

@@ -85,7 +85,8 @@ jupyterlab>4.0,<4.1; platform_system == "Linux"
 requests [security] >= 2.8.1, == 2.8.* ; python_version < "2.7"
 ```
 
-### :tools: Exercise
+>>>
+#### :tools: Exercise
 
 Create your `requirements.txt` and start your `pipenv`environment:
 ```bash
@@ -98,6 +99,7 @@ Look at `Pipfile`and `Pifile.lock`.
 To reset your environment: `pipenv --rm`, it doesn't destroy the `Pipfile(.lock)`, so you can recreate the environment with: `pip install`.
 
 To check in which folder are the dependencies placed: `pipenv --venv`. 
+>>>
 
 ### `environment.yml` example
 
@@ -208,7 +210,7 @@ And with some other environment management tools:
   ```
 
 >>>
-**:tools: Exercise**
+#### :tools: Exercise
 
 Install the dependencies for this tutorial using `pipenv`.