Make some command a little more anonymous

Large-app-how-to.md

@@ -416,15 +416,15 @@ Here is the `/app/__init__.py` :
 
 Let's activate your virtualenv and initialize your database:
 
-    brice@Brice:~/Projects/dev$ . env/bin/activate
-    (env)brice@Brice:~/Projects/dev1$ python shell.py 
+    user@Machine:~/Projects/dev$ . env/bin/activate
+    (env)user@Machine:~/Projects/dev$ python shell.py 
     >>> from app import db
     >>> db.create_all()
     >>> exit()
 
 now you can go in your root and run `python run.py` ... this should give you something like this:
 
-    (env)brice@Brice:~/Projects/dev$ python run.py 
+    (env)user@Machine:~/Projects/dev$ python run.py 
      * Running on http://127.0.0.1:5000/
      * Restarting with reloader