Improves (but does not fix) #1942.
add rake to gemfile generated by gem command
Maybe it should go into the gemspec as development dependency instead. I am really undecided. On any Ruby officially supported by the end of next month, rake is included in the standard library.
This pull request fails (merged 0d2e3c9 into 4ff5838).
The failure reported by @travisbot is not related to this pull request, but due to some apt-get failure. I will trigger it again.
This pull request passes (merged 0d2e3c9 into 4ff5838).
Closing because corresponding issue #1942 was closed after PR. If I'm wrong feel free to reopen or leave a comment and I'll reopen the issue.