[problem specification][problem-specification] | [description][readme] | [canonical data][canonical-data] [problem-specification]: https://github.com/exercism/problem-specifications/tree/master/exercises/grep [readme]: https://github.com/exercism/problem-specifications/blob/master/exercises/grep/description.md [canonical-data]: https://github.com/exercism/problem-specifications/blob/master/exercises/grep/canonical-data.json
