Tell contributors not to write things in the snippet help file. [skip ci]
-## Added `cpp_std` option for the Visual Studio C++ compiler
-Allows the use of C++17 features and experimental not-yet-standardized
-features. Valid options are `c++11`, `c++14`, `c++17`, and `c++latest`.
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+Add release note snippets to their own files, one file per snippet.
