always call callback https://github.com/JuliaNLSolvers/Optim.jl/pull/1184 no kwargs https://github.com/JuliaNLSolvers/Optim.jl/pull/1186 improved summary with io argument https://github.com/JuliaNLSolvers/Optim.jl/pull/1193
always call callback #1184
no kwargs #1186
improved summary with io argument #1193