consistent formating: replace "} else{" with "} else {"

src/KOKKOS/pair_reaxc_kokkos.cpp

src/SRD/fix_srd.cpp

src/USER-LB/fix_lb_fluid.cpp

src/USER-LB/fix_lb_pc.cpp

src/USER-LB/fix_lb_rigid_pc_sphere.cpp

src/USER-REAXC/reaxc_ffield.cpp

src/USER-REAXC/reaxc_lookup.cpp