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A general description is here.
‘names(x) <- NULL’ now clears the names of call and ‘...’ objects.
‘isPairList’ now returns ‘TRUE’ for DOTSXP.
‘all.equal()’ gains methods for ‘environment’s and ‘refClass’es.
‘[<-’ and ‘[[<-’ gain S4 ‘data.frame’ methods to avoid corruption of S4 class information by the S3 methods.
‘callNextMethod()’ should now work within a ‘.local’ call when ‘...’ is absent from ‘formals(.local)’.
‘dput(pairlist(x))’ generates a call to the ‘pairlist’ constructor, instead of the ‘list’ constructor.