[mdspan.extents.ctor] Improve hyphenation/line breaking

Author: tkoeppe

source/containers.tex

@@ -18586,7 +18586,7 @@
 with \tcode{as_const(exts[$d$])}.
 \item
 Otherwise, for all $d$ in the range $[0, \tcode{rank_dynamic()})$,
-direct-non-list-initializes \tcode{\exposidnc{dynamic-extent}\brk{}[$d$]}
+direct-non-list-initializes \exposidnc{dynamic-ex\-tent}\tcode{[$d$]}
 with \tcode{as_const(exts[\exposidnc{dynamic-index-inv}($d$)])}.
 \end{itemize}
 \end{itemdescr}