Not sure I agree. There is a shorthand github option in bundler already which is there (presumably) due to the fact that a good percentage of the gems are sourc

Not sure I agree. There is a shorthand github option in bundler already which is there (presumably) due to the fact that a good percentage of the gems are sourced from there. It would be helpful if pre-bundle update to know that the significant gem source is not available and exiting.