Formatting.

src/cache.h

src/hydro/Gadget2/hydro_iact.h

src/kernel_hydro.h

src/runner.c

src/runner.h

src/runner_doiact_vec.c

src/runner_doiact_vec.h

src/swift.h

src/tools.c

src/vector.h

tests/test27cells.c

tests/testInteractions.c