Fixed bug in R tester setup that always triggered reinstallation of R dependencies #680
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In the R script
r_tester_setup.R, theinstall_depfunction was intended to first check whether packages (andstringiin particular) were already installed before triggering a re-install. However, one of these checks usedinstalled.packagesinstead ofinstalled.packages(), where the latter is required to actually retrieve the list of installed packages, and so the check was always failing.