fix a few more bugs

Author: ChrisRackauckas

docs/src/examples/kepler_problem.md

@@ -137,7 +137,7 @@ analysis_plot2(sol6, H, L)
 There is almost no energy variation but angular momentum varies quite bit. How about only project to the angular momentum conservation manifold?
 
 ```@example kepler
-function angular_manifold(residual,u)
+function angular_manifold(residual,u,p,t)
     residual[1:2] .= initial_first_integrals[2] - L(u[1:2], u[3:4])
     residual[3:4] .= 0
 end

docs/src/examples/min_and_max.md

@@ -58,7 +58,7 @@ f = (t) -> sol(t,idxs=4)
 function is `f`:
 
 ```@example minmax
-using Optimization, OptimizationNLopt
+using Optimization, OptimizationNLopt, ForwardDiff
 optf = OptimizationFunction(f, AutoForwardDiff())
 min_guess = 18.0
 optprob = OptimizationProblem(optf, min_guess)