Integrate P0776R1's changes to <experimental/task_block>'s synopsis

Author: jaredhoberock

task_block.html

@@ -5,10 +5,10 @@ <h1>Task Block</h1>
      <h1>Header <code>&lt;experimental/task_block&gt;</code> synopsis</h1>
 
      <pre>
-namespace std {
-namespace experimental {
-namespace parallel {
-inline namespace v2 {
+<del>namespace std {</del>
+namespace <ins>std::</ins>experimental {
+<ins>inline </ins>namespace parallel<ins>ism_v2</ins> {
+<del>inline namespace v2 {</del>
   class task_cancelled_exception;
 
   class task_block;
@@ -18,32 +18,32 @@ <h1>Header <code>&lt;experimental/task_block&gt;</code> synopsis</h1>
 
   template&lt;class f&gt;
     void define_task_block_restore_thread(F&& f);
+<del>}</del>
 }
 }
-}
-}
+<del>}</del>
      </pre>
    </cxx-section>
 
    <cxx-section id="parallel.task_block.task_cancelled_exception">
      <h1>Class <code>task_cancelled_exception</code></h1>
      <pre>
 
-namespace std {
-namespace experimental {
-namespace parallel
-inline namespace v2 {
+<del>namespace std {</del>
+namespace <ins>std::</ins>experimental {
+<ins>inline </ins>namespace parallel<ins>ism_v2 {</ins>
+<del>inline namespace v2 {</del>
 
   class task_cancelled_exception : public exception
   {
     public:
       task_cancelled_exception() noexcept;
-      virtual const char* what() const noexcept;
+      virtual const char* what() const noexcept<ins> override</ins>;
   };
+<del>}</del>
 }
 }
-}
-}
+<del>}</del>
      </pre>
 
      <p>
@@ -69,10 +69,10 @@ <h1><code>task_cancelled_exception</code> member function <code>what</code></h1>
      <h1>Class <code>task_block</code></h1>
      <pre>
 
-namespace std {
-namespace experimental {
-namespace parallel {
-inline namespace v2 {
+<del>namespace std {</del>
+namespace <ins>std::</ins>experimental {
+<ins>inline </ins>namespace parallel<ins>ism_v2</ins> {
+<del>inline namespace v2 {</del>
 
   class task_block
   {
@@ -89,10 +89,10 @@ <h1>Class <code>task_block</code></h1>
 
       void wait();
   };
+<del>}</del>
 }
 }
-}
-}
+<del>}</del>
      </pre>
 
      <p>