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Felipe Oliveira Carvalho authored and GitHub committed 657c4faf217
GH-41596: [C++] fixed_width_internal.h: Simplify docstring and support bit-sized types (BOOL) (#41597) ### Rationale for this change Post-merge feedback from #41297. ### What changes are included in this PR? - Supporting `BOOL` as both a top-level and nested in FSL types - Removing the long example from the docstring of `IsFixedWidthLike` These changes don't affect users because this header was added recently and not released. ### Are these changes tested? Yes, by existing and new test cases. * GitHub Issue: #41596 Authored-by: Felipe Oliveira Carvalho <felipekde@gmail.com> Signed-off-by: Felipe Oliveira Carvalho <felipekde@gmail.com>