Small grammar fix, thanks Sjoerd.

git-svn-id: http://svn.python.org/projects/python/trunk@52311 6015fed2-1504-0410-9fe1-9d1591cc4771

Doc/lib/libfpectl.tex

@@ -8,7 +8,7 @@ \section{\module{fpectl} ---
 \modulesynopsis{Provide control for floating point exception handling.}
 
 \note{The \module{fpectl} module is not built by default, and its usage
-      is discouraged and may be dangerous except in the hand of
+      is discouraged and may be dangerous except in the hands of
       experts.  See also the section \ref{fpectl-limitations} on
       limitations for more details.}