[flat.set.cons.alloc] Add \linebreak to avoid overfull \hbox

Author: jensmaurer

source/containers.tex

@@ -19238,7 +19238,8 @@
 \pnum
 \effects
 Equivalent to
-\tcode{flat_set(sorted_unique, cont)} and \tcode{flat_set(sorted_unique, cont, comp)}, respectively,
+\tcode{flat_set(sorted_unique, cont)} and
+\tcode{flat_set(sorted_unique, cont,\linebreak comp)}, respectively,
 except that \exposid{c} is constructed with
 uses-allocator construction\iref{allocator.uses.construction}.