Revert my change and add right Header

Author: ClausKlein

.clang-format

@@ -1,10 +1,8 @@
 ---
-BasedOnStyle:                       LLVM
-ConstructorInitializerIndentWidth:  2
-ContinuationIndentWidth:            2
-IndentWidth:                        2
-TabWidth:                           2
-UseTab:                             Never
+BasedOnStyle:    LLVM
+Language:        Json
+IndentWidth:     2
+UseTab:          Never
 ---
 Language:        Cpp
 AccessModifierOffset: -2

include/beman/execution26/detail/sched_env.hpp

@@ -5,6 +5,7 @@
 #define INCLUDED_BEMAN_EXECUTION26_DETAIL_SCHED_ENV
 
 #include <beman/execution26/detail/get_domain.hpp>
+#include <beman/execution26/detail/default_domain.hpp>
 #include <beman/execution26/detail/get_scheduler.hpp>
 #include <type_traits>
 #include <utility>
@@ -32,7 +33,7 @@ namespace beman::execution26::detail
             if constexpr (requires{ this-> sched.query(q); })
                 return this->sched.query(q);
             else
-                return ::beman::execution26::get_domain;
+                return ::beman::execution26::default_domain{};
         }
     };