major neighbor list style whitespace cleanup

src/KOKKOS/npair_kokkos.cpp

src/KOKKOS/npair_kokkos.h

src/USER-INTEL/nbin_intel.cpp

src/USER-INTEL/npair_full_bin_intel.cpp

src/USER-INTEL/npair_full_bin_intel.h

src/USER-INTEL/npair_half_bin_newtoff_intel.cpp

src/USER-INTEL/npair_half_bin_newtoff_intel.h

src/USER-INTEL/npair_half_bin_newton_intel.cpp

src/USER-INTEL/npair_half_bin_newton_intel.h

src/USER-INTEL/npair_half_bin_newton_tri_intel.cpp

src/USER-INTEL/npair_half_bin_newton_tri_intel.h

src/USER-INTEL/npair_intel.cpp

src/npair.cpp

src/npair.h

src/npair_full_bin.h

src/npair_full_bin_atomonly.h

src/npair_full_bin_ghost.h

src/npair_full_nsq_ghost.h

src/npair_half_bin_atomonly_newton.cpp

src/npair_half_respa_bin_newton_tri.cpp