Mike McQuaid 23306ab434 github: produce better curl error messages. (#441)
* global: add RUBY_TWO global variable.

* test-bot: use RUBY_TWO global variable.

* github: produce better curl error messages.

If we don't know why curl has failed then ensure that the error messages
that it produced are included as part of the user output.
2016-07-12 19:46:29 +01:00
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