typo

Author: oscarddssmith

lib/OrdinaryDiffEqDifferentiation/src/derivative_utils.jl

@@ -540,7 +540,7 @@ function calc_W!(W, integrator, nlsolver::Union{Nothing, AbstractNLSolver}, cach
     if W isa WOperator
         if isnewton(nlsolver)
             # we will call `update_coefficients!` for u/p/t in NLNewton
-            update_coefficients!(W, dtgamma)
+            update_coefficients!(W; dtgamma)
         else
             update_coefficients!(W, uprev, p, t; dtgamma)
         end

test/interface/utility_tests.jl

@@ -10,7 +10,7 @@ using OrdinaryDiffEq.OrdinaryDiffEqDifferentiation: WOperator, calc_W, calc_W!,
     tspan = (0.0, 1.0)
     dt = 0.01
     dtgamma = 0.5dt
-    concrete_W = -mm + dtgamma * A
+    concrete_W = A - inv(dtgamma)*mm
 
     # Out-of-place
     fun = ODEFunction((u, p, t) -> A * u;