More formatting tweaks

docs/source/developer_documentation.rst

@@ -42,6 +42,7 @@ PyRenew Principles
    -  Use ``DeterministicVariable``\ s instead of constants within a model.
 
 - ``scan`` conventions
+
    - Use ``jax.lax.scan`` for any scan whose iterations are deterministic, i.e. iterations contain no internal calls to ``RandomVariable.sample()`` or ``numpyro.sample()``.
    - Use ``numpyro.scan`` for any scan whose the iterations are stochastic, i.e. the iterations potentially include calls to ``RandomVariable.sample()`` or ``numpyro.sample()``