Remove redlining from [parallel.task_block.task_cancelled_exception]

Author: jaredhoberock

task_block.html

@@ -25,21 +25,17 @@ <h1>Header <code>&lt;experimental/task_block&gt;</code> synopsis</h1>
      <h1>Class <code>task_cancelled_exception</code></h1>
      <pre>
 
-<del>namespace std {</del>
-namespace <ins>std::</ins>experimental {
-<ins>inline </ins>namespace parallel<ins>ism_v2 {</ins>
-<del>inline namespace v2 {</del>
+namespace std::experimental {
+inline namespace parallelism_v2 {
 
   class task_cancelled_exception : public exception
   {
     public:
       task_cancelled_exception() noexcept;
-      virtual const char* what() const noexcept<ins> override</ins>;
+      virtual const char* what() const noexcept override;
   };
-<del>}</del>
 }
 }
-<del>}</del>
      </pre>
 
      <p>