For spawn*(), point to the magic constants; some readers have a hard
time finding the bindings.
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index d17c911..a519366 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -676,7 +676,8 @@
specified in \var{args} as command-line parameters. \var{args} may be
a list or a tuple. \var{mode} is a magic operational constant. See
the Visual \Cpp{} Runtime Library documentation for further
-information.
+information; the constants are exposed to the Python programmer as
+listed below.
Availability: Windows.
\versionadded{1.5.2}
\end{funcdesc}
@@ -686,7 +687,8 @@
specified in \var{args} as command-line parameters and the contents of
the mapping \var{env} as the environment. \var{args} may be a list or
a tuple. \var{mode} is a magic operational constant. See the Visual
-\Cpp{} Runtime Library documentation for further information.
+\Cpp{} Runtime Library documentation for further information; the
+constants are exposed to the Python programmer as listed below.
Availability: Windows.
\versionadded{1.5.2}
\end{funcdesc}