[rubygems/rubygems] If GEM_HOME exists + isn't writable, use --user-install.
https://github.com/rubygems/rubygems/commit/6d20585645
[rubygems/rubygems] If GEM_HOME exists + isn't writable, use --user-install.
https://github.com/rubygems/rubygems/commit/6d20585645