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

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

Author: dietmarkuehl

source/exec.tex

@@ -5879,7 +5879,7 @@
 \pnum
 \effects
 Returns an object of type \exposid{ts-sender} containing a sender
-initialized with\linebreak \tcode{schedule(SCHED(*this))}. % avoid Overfull
+initialized with \tcode{sched\-ule(\brk{}\exposid{SCHED}(*this))}.
 \end{itemdescr}
 
 \begin{itemdecl}