tomlplusplus/.github/pull_request_template.md

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**What does this change do?**
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    Changes all Foos to Bars.
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**Is it related to an exisiting bug report or feature request?**
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    Fixes #69.
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**Pre-merge checklist**
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- [ ] I've read [CONTRIBUTING.md]
- [ ] I've added new test cases to verify my change
- [ ] I've regenerated toml.hpp ([how-to])
- [ ] I've updated any affected documentation
- [ ] I've rebuilt and run the tests with at least one of:
    - [ ] Clang 6 or higher
    - [ ] GCC 7 or higher
    - [ ] Visual Studio 2019
- [ ] I've forever enshrined myself in glory by adding myself to the list of contributors in [README.md](https://github.com/marzer/tomlplusplus/blob/master/README.md)



**Anything else?**
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[CONTRIBUTING.md]: https://github.com/marzer/tomlplusplus/blob/master/CONTRIBUTING.md
[how-to]: https://github.com/marzer/tomlplusplus/blob/master/CONTRIBUTING.md#regenerating-tomlhpp
[README.md]: https://github.com/marzer/tomlplusplus/blob/master/README.md