`References : ` -> 
```
References
----------
```
And a lot more similar changes.

Follow the [NumPy DocString Standard](https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt#documenting-classes) or look at the docstrings of [other functions] (https://github.com/scikit-image/scikit-image/blob/master/skimage/filter/edges.py#L150)