GSL/include/gsl/gsl_util

#pragma once
#pragma message("This header will soon be removed. Use <gsl/util> instead of <gsl/gsl_util>")
#include "util"
renaming main logic files. Added warning message of the removal and include passthrough. Renamed includes in the source files. Ran Clang-Format (#946) Header rename 2020-10-29 20:38:48 -04:00			`#pragma once`
			`#pragma message("This header will soon be removed. Use <gsl/util> instead of <gsl/gsl_util>")`
quoted form of #include when GSL includes GSL files (#1030) [SF.12: Prefer the quoted form of #include for files relative to the including file and the angle bracket form everywhere else](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Rs-incform) Additionally changed #include order in `span` so that all `span_ext` is in the GSL include block and not in the STL include block. Fixes issues #1025. Co-authored-by: Werner Henze <w.henze@avm.de> 2022-01-31 16:06:42 -05:00			`#include "util"`