fixup: use \brk{} to avoid overfull hbox and remove comment

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

Author: dietmarkuehl

source/exec.tex

@@ -6413,8 +6413,7 @@
 If \tcode{same_as<inline_scheduler, scheduler_type>} is \tcode{true}
 returns \tcode{as_awaitable(\linebreak std::forward <Sender>(sndr), % avoid Overfull
 *this)}; otherwise returns
-\tcode{as_awaitable(affine_on(\linebreak std::forward<Sender>(sndr), % avoid Overfull
-SCHED(*this)), *this)}.
+\tcode{as_awaitable(affine_on(\brk{}std::forward<Sender>(sndr), \exposid{SCHED}(*this)), *this)}.
 \end{itemdescr}
 
 \begin{itemdecl}