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A general description is here.
‘mget()’ now has a default for ‘envir’ (the frame from which it is called), for consistency with ‘get()’ and ‘assign()’.
‘make pdf’ and ‘make install-pdf’ now make and install the full reference index (including ‘compiler’, ‘parallel’ and the recommended packages).
Packages ‘compiler’ and ‘parallel’ have been added to the reference index (‘refman.pdf’).
The full reference index (‘fullrefman.pdf’) was missing packages ‘compiler’ and ‘parallel’.
‘R CMD check’ now checks for ‘.C()’, ‘.Call()’, ‘.External()’ and ‘.Fortran()’ calls in other packages, and gives a warning on those found from R itself (which are not part of the API and change without notice: many will be changed for R 3.0.0).