Simplify code blocks

 
 ## Usage
 
-    !bash
     mkdir example.site && cd example.site
     poetry init --name=example-site
     poetry add webint

 
 ### Hack
 
-    !bash
     poetry run web run example:app --port 9999
 
 Changes to your python code will auto-reload the local development server.
 
 #### Deploy an update
 
-    !bash
     poetry version (major|minor|patch)
     poetry publish