Update and test with some newer compilers and cmake versions
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* work on the flags book chapter and making sure the values are initialized properly.
* Fix initialization of values used in flags or options
* update some formatting and more brace initialization
* update more formatting and fix a incorrect initializer
* more formatting and some error fixes
* more formatting
* Small formatting fix
Co-authored-by: Henry Schreiner <HenrySchreinerIII@gmail.com>