r_show_vars Show PATH changes made by R installation logic
Not seeing them makes diagnosing issues like https://travis-ci.community/t/in-r-version-4-0-0-library-path-not-writable/9744 and https://travis-ci.community/t/r-support-failed-on-xenial/9822 impossible.
AMD64
Ruby: 2.5.8
Git
INTEGRATION_SPECS=0