Update src/Limiters/vertical_mass_borrowing_limiter.jl

Co-authored-by: Tapio Schneider <[email protected]>

src/Limiters/vertical_mass_borrowing_limiter.jl

@@ -6,7 +6,7 @@ import .DataLayouts as DL
 A vertical-only mass borrowing limiter.
 
 The mass borrower borrows tracer mass from an adjacent, lower layer.
-It conserves the mass and can avoid negative tracers.
+It conserves the total tracer mass and can avoid negative tracers.
 
 At level k, it will first borrow the mass from the layer k+1 (lower level).
 If the mass is not sufficient in layer k+1, it will borrow mass from