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qr.coef() failed in the complex case for non-square systems. (PR#13305)
plot.dendrogram(horizontal=TRUE) did not not plot 'edgetext' at the correct locations. (PR#13313)
The starting point for plot.acf(ci.type="ma") was lag 0 when it should have been lag 1. (PR#13071)
Rcmd INSTALL has a new option --pkglock to allow a per-package lock directory (useful for parallel installs).