Minor fix for docs (#181)

Author: neerajprad

docs/source/distributions.rst

@@ -3,15 +3,15 @@ Base Distribution
 
 Distribution
 ------------
-.. autoclass:: numpyro.distributions.Distribution
+.. autoclass:: numpyro.distributions.distribution.Distribution
     :members:
     :undoc-members:
     :show-inheritance:
     :member-order: bysource
 
 TransformedDistribution
 -----------------------
-.. autoclass:: numpyro.distributions.TransformedDistribution
+.. autoclass:: numpyro.distributions.distribution.TransformedDistribution
     :members:
     :undoc-members:
     :show-inheritance:

numpyro/util.py

@@ -106,7 +106,7 @@ def fori_collect(n, body_fun, init_val, transform=identity, progbar=True, **prog
     effect of collecting values from the loop body. In addition, this allows for
     post-processing of these samples via `transform`, and progress bar updates.
     Note that, in some cases, `progbar=False` can be faster, when collecting a
-    lot of samples.
+    lot of samples. Refer to example usage in :func:`~numpyro.mcmc.hmc`.
 
     :param int n: number of times to run the loop body.
     :param body_fun: a callable that takes a collection of