Merge branch 'master' into concepts-in-comparisons

* master:
  Modernize (partially) the comparisons header's module namespaces.
  Allow for setting of delimiters.
  Match `noexcept` on `cbegin`/`cend` deletions to std.
  Fixup an example in comments on options.

 Conflicts:
	comparisons.h

IOStreams/delimiters.h

@@ -27,6 +27,9 @@ namespace Alepha::Hydrogen::IOStreams  ::detail::  delimiters_m
 		explicit
 		Delimiter( const std::string dflt )
 			: state( [dflt] { return dflt; } ) {}
+
+		void set( const std::string s ) { state.setDefault( s ); }
+		void set( const char c ) { set( std::string{ c } ); }
 	};
 
 	namespace exports

Memory/Buffer.h

@@ -448,8 +448,8 @@ namespace Alepha::Hydrogen::inline exports::inline Buffer_m
 
 template<>
 constexpr auto
-std::cbegin( const ::Alepha::Hydrogen::Buffer< Alepha::Hydrogen::Mutable > &range ) -> decltype( range.begin() )= delete;
+std::cbegin( const ::Alepha::Hydrogen::Buffer< Alepha::Hydrogen::Mutable > &range ) noexcept( noexcept( std::begin( range ) ) ) -> decltype( range.begin() )= delete;
 
 template<>
 constexpr auto
-std::cend( const ::Alepha::Hydrogen::Buffer< Alepha::Hydrogen::Mutable > &range ) -> decltype( range.end() )= delete;
+std::cend( const ::Alepha::Hydrogen::Buffer< Alepha::Hydrogen::Mutable > &range ) noexcept( noexcept( std::end( range ) ) ) -> decltype( range.end() )= delete;

ProgramOptions.h

@@ -51,7 +51,7 @@ static_assert( __cplusplus > 2020'99 );
  * int
  * main( int argc, const char **argv )
  * {
- *     using namespace Alepha::program_options;
+ *     using namespace Alepha::exports::ProgramOptions_m;
  *
  *     //Let's define a few options: 
  *