LGTM, thanks!
https://codereview.appspot.com/563420043/diff/547500043/lily/grob.cc File lily/grob.cc (right): https://codereview.appspot.com/563420043/diff/547500043/lily/grob.cc#newcode492 lily/grob.cc:492: return real_ext; whitespace https://codereview.appspot.com/563420043/diff/547500043/lily/include/align-interface.hh File lily/include/align-interface.hh (right): https://codereview.appspot.com/563420043/diff/547500043/lily/include/align-interface.hh#newcode37 lily/include/align-interface.hh:37: get_pure_minimum_translations (Grob *, std::vector<Grob *> const &, maybe indent this line by two spaces? https://codereview.appspot.com/563420043/
