Handle calls to failure_slash_error_line[s]. #554
Merged
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This PR replaces #553
failure_slash_error_line is currently not defined in rspec-core
(ref https://github.com/rspec/rspec-core/blob/master/lib/rspec/core/formatters/exception_presenter.rb).
This change uses it or failure_slash_error_lines if either of those are defined.
Ref this tweet: https://twitter.com/kantrn/status/664913752832126976
I have tried this locally on my cookbook development and the error is resolved. I don't know how to run the rspec tests for serverspec itself, though, so this PR is effectively untested.