fixed Trailing whitespaces in rst

doc/src/Howto_bioFF.rst

@@ -96,7 +96,7 @@ The newer styles with *charmmfsw* or *charmmfsh* in their name replace energy sw
         C(r) \frac{\displaystyle (b-r)^2}{\displaystyle r b^2}, &  r \leq b \\
         0, & r > b
       \end{cases}
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+
 .. image:: img/howto_charmmfsw_ELJ.png
   :align: center
 
@@ -104,7 +104,6 @@ The newer styles with *charmmfsw* or *charmmfsh* in their name replace energy sw
 
 These styles are used by LAMMPS input scripts generated by `charmm-gui.org <https://charmm-gui.org/>`_ :ref:`(Brooks) <howto-Brooks>`. A `minimal PDB example 1HVN <https://www.rcsb.org/structure/1HVN>`_ with at least one protein segment, at least one DNA segment, and no modified engineered residues is available in the ``lammps/examples/charmm/1hvn`` directory. A better example is `PDB 2CV5 <https://www.rcsb.org/structure/2CV5>`_ with size too big to include in lammps examples, which is left as an exercise to the reader (go to charmm-gui.org and type in 2CV5 in PDB field of Solution Builder to generate LAMMPS scripts to simulate a solvated human nucleosome with histone octamer and dsDNA wrapped around it).
 
- 
 .. note::
 
    For CHARMM, newer *charmmfsw* or *charmmfsh* styles were released in
@@ -112,8 +111,7 @@ These styles are used by LAMMPS input scripts generated by `charmm-gui.org <http
    styles.  See discussion of the differences on the :doc:`pair charmm
    <pair_charmm>` and :doc:`dihedral charmm <dihedral_charmm>` doc
    pages.
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 COMPASS
 -------