Fix printing in some of the docs

docs/src/basics/Logging.md

@@ -39,6 +39,7 @@ the trace to see what is happening:
 
 ```@example tracing
 solve(prob; show_trace = Val(true), trace_level = TraceAll(10))
+nothing; # hide
 ```
 
 You can also store the trace in the solution object:

docs/src/tutorials/optimizing_parameterized_ode.md

@@ -55,13 +55,23 @@ Now, we can use any NLLS solver to solve this problem.
 ```@example parameterized_ode
 res = solve(nlls_prob, LevenbergMarquardt(); maxiters = 1000, show_trace = Val(true),
     trace_level = TraceAll())
+nothing # hide
+```
+
+```@example parameterized_ode
+res
 ```
 
 We can also use Trust Region methods.
 
 ```@example parameterized_ode
 res = solve(nlls_prob, TrustRegion(); maxiters = 1000, show_trace = Val(true),
     trace_level = TraceAll())
+nothing # hide
+```
+
+```@example parameterized_ode
+res
 ```
 
 Let's plot the solution.
@@ -72,5 +82,4 @@ sol_fit = solve(prob2, Tsit5(); p = res.u)
 sol_true = solve(prob2, Tsit5(); p = p)
 plot(sol_true; linewidth = 3)
 plot!(sol_fit; linewidth = 3, linestyle = :dash)
-savefig("LV_ode_fit.png")
 ```