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A general description is here.
‘optim(*, lower = c(-Inf, -Inf))’ no longer warns (and switches the method), thanks to a suggestion by John Nash.
‘predict(fm, newdata)’ is now correct also for models where the formula has terms such as ‘splines::ns(..)’ or ‘stats::poly(..)’, fixing PR#17414, based on a patch from Duncan Murdoch.
‘simulate.lm(glm(*, gaussian(link = <non-default>)))’ has been corrected, fixing PR#17415 thanks to Alex Courtiol.
‘unlist(x)’ no longer fails in some cases of nested empty lists. Reported by Steven Nydick.