fix typo, reformat paragraph

In LAMMPS, body particles are generalized finite-size particles.

Individual body particles can represent complex entities, such as

surface meshes of discrete points, collections of sub-particles,

deformable objects, etc.  Note that other kinds of finite-size

spherical and aspherical particles are also supported by LAMMPS, such

as spheres, ellipsoids, line segments, and triangles, but they are

simpler entities that body particles.  See the :doc:`Howto spherical <Howto_spherical>` doc page for a general overview of all

these particle types.

deformable objects, etc.  Note that other kinds of finite-size spherical

and aspherical particles are also supported by LAMMPS, such as spheres,

ellipsoids, line segments, and triangles, but they are simpler entities

than body particles.  See the :doc:`Howto spherical <Howto_spherical>`

doc page for a general overview of all these particle types.

Body particles are used via the :doc:`atom_style body <atom_style>`

command.  It takes a body style as an argument.  The current body