Guess a full test cycle for this one would be excessive. As far as I am concerned, feel free to push this one.
commit a7db98fdf7003206147f0b0e7ba77c53db0e2bbd Author: Han-Wen Nienhuys <hanwen@lilypond.org> Date: Tue Feb 11 09:00:07 2020 +0100 Move include guard for fluid.hh