Merge pull request #449 from timsong-cpp/master

Fix link in basic_ostream::flush() description

Author: jwakely

source/iostreams.tex

@@ -6632,7 +6632,7 @@
 
 \begin{itemdescr}
 \pnum
-\effects Behaves as an unformatted output function (as described in~\ref{ostream.formatted.reqmts}, paragraph 1).
+\effects Behaves as an unformatted output function (as described in~\ref{ostream.unformatted}, paragraph 1).
 If
 \tcode{rdbuf()}
 is not a null pointer,