Fix markdown syntax for venvs with modern triple-tick

docs/install/virtual-environments.md

@@ -26,10 +26,11 @@ To create a virtual enviroment, choose a folder where you want to install
 a copy of Python and keep the enviroment's packages. For this example, we'll
 call the environment "mpfenv" and put it in our home directory (known as "~").
 
-.. code-block:: console
+``` console
   python3 -m venv ~/mpfenv
-.. note::
+```
 
+!!! note
   If you have multiple versions of Python3 (say, 3.9 and 3.11), you can specify
   which one to use in the virtual environment: ``python3.9 -m venv ~/mpfenv``
 
@@ -44,34 +45,39 @@ To keep itself isolated from other programs, your virtual enviroment only
 activates when you tell it to.
 You can enable the virtual environment with the dot command from the terminal:
 
-.. code-block:: console
+``` console
   . ~/mpfenv/bin/activate
+```
+
 Note that the first character is a period, followed by a space, then the path
 to your virtual environment and "/bin/activate".
 
-For users on Mac OSX, you will use `source` instead of the dot:
+For users on Mac OSX, you will use `source` instead of the period:
 
-.. code-block:: console
+``` console
   source ~/mpfenv/bin/activate
+```
 
-.. note::
-
+!! note  Make note of this activation command
   You may want to write this step down, as you'll run it every time you open up
-  a terminal window to work on MPF
+  a terminal window to work on MPF. If you are on a dedicated MPF machine, you
+  could add this line to your bash/zsh profile to automatically run it at login.
 
 You'll know you're in the virtual environment because the console prompt will include
 the name of your venv in parenthesis.
 
-.. code-block:: console
+``` console
   My-Mac:~ python --version
   Python 2.7.10
   My-Mac:~ source ~/mpfenv/bin/activate
   (mpfenv) My-Mac:~ python --version
   Python 3.9.13
   (mpfenv) My-Mac:~
-.. note::
+```
 
+!!! note
    The python you used to create the virtual environment will now be the
-   default python. Outside the virtual environment "python" is Python 2 and
-   you must type "python3" to use Python 3; inside the virtual environment,
-   you can use "python" to refer to Python 3.
+   default python. Outside the virtual environment "python" may be Python 2 or 3, and
+   "python3" may be 3.6 or 3.9 or 3.11; inside the virtual environment,
+   you can use "python" to refer to the exact version of Python 3 you used
+   to create the virtual environment