[istream.unformatted] Add period at end of "Returns"

Andreas-Krug · jwakely · commit be34ebfac394 · 2025-07-02T19:53:01.000+01:00
diff --git a/source/iostreams.tex b/source/iostreams.tex
@@ -5384,7 +5384,7 @@
 \begin{itemdescr}
 \pnum
 \returns
-\tcode{getline(s, n, widen('\textbackslash n'))}
+\tcode{getline(s, n, widen('\textbackslash n'))}.
 \end{itemdescr}
 
 \indexlibrarymember{ignore}{basic_istream}%
