Fix docs

Author: ddomingof

docs/source/diffusion.rst

@@ -81,7 +81,7 @@ Summary table of methods with statistical normalization
 
 .. automodule:: diffupy.diffusion_raw
    :members:
-   
+
 References
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 1. Bersanelli, M. et al. (2016). Network diffusion-based analysis of high-throughput data for the detection of

docs/source/index.rst

@@ -29,7 +29,7 @@ Installation is as easy as getting the code from `PyPI <https://pypi.python.org/
 References
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 .. [1] Picart-Armada, S., *et al.* (2017). `Null diffusion-based enrichment for metabolomics data
-<https://doi.org/10.1371/journal.pone.0189012>`_. *PloS one* 12.12.
+   <https://doi.org/10.1371/journal.pone.0189012>`_. *PloS one* 12.12.
 
 Disclaimer
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