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Title: GitHub - thoughtbot/upcase: Sharpen your programming skills.

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Open Graph Description: Sharpen your programming skills. Contribute to thoughtbot/upcase development by creating an account on GitHub.

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	https://github.com/
Sign in	https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fthoughtbot%2Fupcase
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	https://github.com/thoughtbot/upcase#upcase
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URLs of crawlers that visited me.