fixup: use \brk{} to deal with overfull hbox

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

Author: dietmarkuehl

source/exec.tex

@@ -5857,8 +5857,7 @@
 \pnum
 \effects
 Initialize \exposid{sch_} with
-\tcode{allocate_shared<remove_cvref_t<Sch>>(alloc, \linebreak % avoid Overfull
-std::forward<Sch>(sch))}.
+\tcode{allocate_shared<remove_cvref_t<Sch>>(alloc,\brk{} std::forward<Sch>(sch))}.
 
 \pnum
 \recommended Implementations should avoid the use of dynamically