fixup: apply proper indentation

Co-authored-by: Jan Schultke <[email protected]>

Author: dietmarkuehl

source/exec.tex

@@ -5816,7 +5816,7 @@
   class task_scheduler {
     class @\exposidnc{ts-sender}@; // \expos
     template<@\libconcept{receiver}@ R>
-    class @\exposidnc{state}@;  // \expos
+      class @\exposidnc{state}@;  // \expos
 
   public:
     using scheduler_concept = scheduler_t;