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the empty string is also not that satisfying, what might cause this to error?","created_at":"2016-06-04T13:57:41Z","updated_at":"2016-06-04T13:57:41Z","html_url":"https://github.com/JuliaLang/julia/pull/16537#discussion_r65802830","pull_request_url":"https://api.github.com/repos/JuliaLang/julia/pulls/16537","_links":{"self":{"href":"https://api.github.com/repos/JuliaLang/julia/pulls/comments/65802830"},"html":{"href":"https://github.com/JuliaLang/julia/pull/16537#discussion_r65802830"},"pull_request":{"href":"https://api.github.com/repos/JuliaLang/julia/pulls/16537"}}},"pull_request":{"url":"https://api.github.com/repos/JuliaLang/julia/pulls/16537","id":71102503,"html_url":"https://github.com/JuliaLang/julia/pull/16537","diff_url":"https://github.com/JuliaLang/julia/pull/16537.diff","patch_url":"https://github.com/JuliaLang/julia/pull/16537.patch","issue_url":"https://api.github.com/repos/JuliaLang/julia/issues/16537","number":16537,"state":"open","locked":false,"title":"LibGit2: added 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