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fix whitespace to make pre-hook check happy

Author: orbeckst

doc/source/formats/guessers/default.rst

@@ -59,7 +59,7 @@ Aromaticities
 
 These are guessed using the :ref:`RDKit <RDKit-format>` converter by using the ``GetIsAromatic`` method.
 
-.. note:: 
+.. note::
    RDKit needs to have been installed for aromaticity guessing to be available.
    RDKit is always installed when MDAnalysis was installed with conda-forge packages
    but this may not be the case when using other installation paths.

doc/source/guessing.rst

@@ -135,7 +135,7 @@ Order of guessing
 
 The order of the attributes guessed can matter in some cases. For example, bond guessing with the :class:`~MDAnalysis.guesser.default_guesser.DefaultGuesser` relies on looking up the vdW radii of the atoms involved by their atom ``type``. That means that for file formats where the atom ``type`` is not a valid element, the atom ``type`` must be forcefully re-guessed for bond-guessing to work.
 
-.. note:: 
+.. note::
 
    The behaviour of looking up radii by *type* will likely change to looking up by *element* in version 3.0.