willingc comment on r readme
@@ -11,8 +11,8 @@ two files:
Where 'YYYY', 'MM' and 'DD' refer to a specific
date snapshot of https://mran.microsoft.com/timemachine
from which libraries will be installed.
-* An optional ``install.R`` file that will be executed at build time and can
- be used for installing packages from both MRAN and GitHub.
+* An optional ``install.R`` file that will be executed by an R installation
+ at build time. It can be used for installing packages from MRAN or GitHub.
The presence of ``runtime.txt`` is enough to set up R, RStudio, and IRKernel. It
uses the ``r-base`` package from the Ubuntu apt repositories to install
