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The C header file ‘S.h’ is no longer documented: its use should be replaced by ‘R.h’.
The ‘make’ macro ‘AWK’ which is long unused by R itself but recorded in file ‘etc/Makeconf’ is deprecated and will be removed in R 3.3.0.
‘pretty(D)’ for date-time objects ‘D’ now also works well if ‘range(D)’ is (much) smaller than a second. In the case of only one unique value in ‘D’, the pretty range now is more symmetric around that value than previously.
Similarly, ‘pretty(dt)’ no longer returns a length 5 vector with duplicated entries for ‘Date’ objects ‘dt’ which span only a few days.