undoing damage by lastest patch
correct ' to " to permit expansion
once more dealing with shell escape under quotes
and once more dealing with shell escape under quotes
and once more dealing with shell escape under quotes
once more dealing with shell escape under quotes
Merge pull request #37 from eddelbuettel/master

Undoing earlier overzealous pull request
Update tests for `r_install` on multiple packages.

(Based on a comment from @krlmlr.)
Update `fakepackage`.
Tweak a test yet again.
Remove a currently broken test.

Something funny is going on here; I'm filing #41 to track it.