Update documentation of save_start and save_end#1251

ChrisRackauckas merged 1 commit intoSciML:masterSciML/DiffEqBase.jl:masterfrom

ChrisRackauckas-Claude:update-save-start-end-docsChrisRackauckas-Claude/DiffEqBase.jl:update-save-start-end-docsCopy head branch name to clipboard