fix plot.

Author: gzagatti

benchmarks/Jumps/Mendes_multistate_example.jmd

@@ -55,7 +55,7 @@ for (i,method) in enumerate(methods)
     end
 end
 push!(p, plot((1:4)', framestyle = :none, legend=:inside, labels=varlegs))
-plot(p..., layout=(4,2), format=fmt)
+plot(p..., layout=(5,2), format=fmt)
 ```
 
 # Benchmarking performance of the methods