Dollar dollar

templates/doc.md

@@ -18,7 +18,7 @@ The URL contains a unique ID such as `oranges-arkansas-mexico-fish`. You can sha
 The underlying graph state simulator is based on Anders' and Briegel's method. Full docs for the Python package are [here](https://peteshadbolt.co.uk/static/abp/). You can install it like this:
 
     :::bash
-    pip install abp
+    $ pip install abp
 
 
 ## API