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A general description is here.
‘promptClass()’ now works for reference classes and gives a suitably specialized skeleton of documentation.
Also, ‘callSuper()’ now works via the ‘methods()’ invocation as well as for initially specified methods.
‘system()’ and ‘system2()’ with output redirected to a character vector now give a warning if the command returns a non-zero error code. (This is what a Unix-alike does as from R 2.12.0.)