[R-SIG-Mac] Wrong link on CRAN Mac subpage

[Berend Hasselman]

On the CRAN page: https://cran.r-project.org/bin/macosx/tools/
in the first important note: there is this sentence

<....>
We are also providing Clang 4.0.0 binaries for OS X 10.11 and higer in our libs directory (note that the offical Clang 4.0.0 binaries on support macOS 10.12) and will provide an Apple Installer package here soon.
</...>

1. The link in "in our libs directory" refers to http://r.research.att.com/lib which should be http://r.research.att.com/libs

2. higer ==> higher  (and maybe change OS X into macOS ?. Apple seems to do that on https://developer.apple.com/download/more/?=command%20line%20tools since December 12, 2016)

3.  In the text "(note that the offical Clang 4.0.0 binaries on support macOS 10.12)" 
     - offical ==> official
     - I don't understand  ... binaries on ... ; shouldn't "on" be "only"?

Apologies for nitpicking but the link to libs didn't "work".

Berend Hasselman