[mdspan.sub.helpers] Use period for \returns (#8977)

hewillk · web-flow · commit 3532b45c6d9d · 2026-04-22T18:30:10.000+02:00
diff --git a/source/containers.tex b/source/containers.tex
@@ -25891,7 +25891,7 @@
 
 \pnum
 \returns
-\tcode{extent_slice\{.offset = offset, .extent = extent, .stride = stride\};}
+\tcode{extent_slice\{.offset = offset, .extent = extent, .stride = stride\}}.
 \end{itemdescr}
 
 \indexlibraryglobal{\exposid{canonical-slice}}
