[common.iter.const] Add missing period for Returns (#6584)

hewillk · web-flow · commit 34cf81ebc821 · 2023-10-03T20:59:42.000+02:00
diff --git a/source/iterators.tex b/source/iterators.tex
@@ -5581,7 +5581,7 @@
 
 \pnum
 \returns
-\tcode{*this}
+\tcode{*this}.
 \end{itemdescr}
 
 \rSec3[common.iter.access]{Accessors}
