[Rd] system2 doesn't quote stdin on unix, unlike stdout, stderr & input and on Windows

Hi again! While investigating the bug report [*] I found out that on unix, system2 does not quote its `stdin` argument while preparing the command line to launch. It does shQuote the `stdout` and `stderr` arguments, and also the `f <- tmpfile()` variable (which is used if `input` argument is prov

Re: [Rd] Inconsistencies in wilcox.test

I see I am too late to comment :) But commenting after the fact, just wish to say that I like the changes. Specially the mentioning of "exact" in the test name. Floating point prevision is very nicely implemented too. My only worry is that it will not serve new/lay users that may be in the bi