This blog is updated daily..
A general description is here.
trigamma(x) and other psigamma(x,n) calls are now accurate also for
very large abs(x). (PR#14020)
[will move to '2.10 patched']
New print() (S3) method for class "function", also used for auto-printing. Further, .Primitive functions now print and auto-print identically. The new method is based on code suggestions by Romain Franççois.
A new dynamic HTML help system is used by default, and may be controlled using tools::startDynamicHelp(). With this enabled, HTML help pages will be generated on request, resolving links by searching through the current .libPaths(). The user may set options("help.ports") to control which IP port is used by the server.
Trying to assign into a raw vector with an index vector containing NAs could cause a segfault. Reported by Hervéé Pagèès.
gregexpr() no longer segfaults when "" is given as the search pattern. Thanks to Hervéé Pagèès for the bug report.
CHAR() now returns (const char *) since CHARSXPs should no longer be modified in place. This change allows compilers to warn or error about improper modification. Thanks to Hervéé Pagèès for the suggestion.