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‘close()’ now returns an integer status where available, invisibly. (Wish of PR#15088.)
The ‘@<-’ operator is now implemented as a primitive, which should reduce some copying of objects when used.
‘qt(1e-12, 1.2)’ no longer gives ‘NaN’.
On Windows the ‘untar()’ function now quotes the directory name when using an external ‘tar’ utility, so ‘R CMD check’ will handle pathnames containing spaces.