Confusing explanation for example app

[mhucka]

The doc string near the top of examples/app.py states:

Run example development server:
.. code-block:: console
   $ pip install -e .[all]
   $ cd examples
   $ export FLASK_APP=app.py
   $ ./app-setup.sh
   $ ./app-fixtures.sh

Run example development server:
.. code-block:: console
    $ flask run --debugger -p 5000

The heading is repeated ("run example development server"). This is confusing and makes it hard to understand what one is supposed to do.