コード中の全角スペースを修正

Author: Raclamusi

reference/execution/execution/let_value.md

@@ -134,7 +134,7 @@ namespace std::execution {
 using LetFn = remove_cvref_t<data-type<Sndr>>;
 auto cs = get_completion_signatures<child-type<Sndr>, FWD-ENV-T(Env)...>();
 auto fn = []<class... Ts>(decayed-typeof<set-cpo>(*)(Ts...)) {
-  if constexpr (!is-valid-let-sender) 　// see below
+  if constexpr (!is-valid-let-sender) // see below
     throw unspecified-exception();
 };
 cs.for-each(overload-set(fn, [](auto){}));

reference/execution/execution/parallel_scheduler.md

@@ -84,7 +84,7 @@ namespace ex = std::execution;
 
 int main()
 {
-　ex::scheduler auto sch = ex::get_parallel_scheduler();
+  ex::scheduler auto sch = ex::get_parallel_scheduler();
   static_assert(std::same_as<decltype(sch), ex::parallel_scheduler>);
 }
 ```

reference/execution/execution/when_all.md

@@ -368,7 +368,7 @@ int main()
   // snd1,snd2両方の完了を待機するSender
   ex::sender auto sndr = ex::when_all(snd1, snd2);
 
-　auto result = std::this_thread::sync_wait(sndr);
+  auto result = std::this_thread::sync_wait(sndr);
   // result := optional<tuple<string,int,char>>型
   std::println("result={}", result.value());
 }