-body.hpp files are source files, not headers.
namespace principia.
namespace test_utilities.
namespace quantities.
namespace constants.
namespace type_generators.
namespace astronomy.
namespace bipm.
namespace cgs.
Misplaced body.
namespace si.
namespace factories.
namespace uk.
namespace Admiralty.
namespace geometry.
Merge branch 'Google-styleguide-compliance-in-namespace-names'