Document PyOS_CheckStack().
Fix a couple of really minor markup nits.
diff --git a/Doc/api/api.tex b/Doc/api/api.tex
index fe09550..1f20129 100644
--- a/Doc/api/api.tex
+++ b/Doc/api/api.tex
@@ -850,7 +850,8 @@
temporarily.
\end{cfuncdesc}
-\begin{cfuncdesc}{void}{PyErr_Restore}{PyObject *type, PyObject *value, PyObject *traceback}
+\begin{cfuncdesc}{void}{PyErr_Restore}{PyObject *type, PyObject *value,
+ PyObject *traceback}
Set the error indicator from the three objects. If the error
indicator is already set, it is cleared first. If the objects are
\NULL{}, the error indicator is cleared. Do not pass a \NULL{} type
@@ -858,7 +859,7 @@
string or class; if it is a class, the value should be an instance of
that class. Do not pass an invalid exception type or value.
(Violating these rules will cause subtle problems later.) This call
-takes away a reference to each object, i.e. you must own a reference
+takes away a reference to each object, i.e.\ you must own a reference
to each object before the call and after the call you no longer own
these references. (If you don't understand this, don't use this
function. I warned you.) \strong{Note:} This function is normally
@@ -1062,6 +1063,15 @@
process, this function does not need to be called.
\end{cfuncdesc}
+\begin{cfuncdesc}{int}{PyOS_CheckStack}{}
+Return true when the interpreter runs out of stack space. This is a
+reliable check, but is only available when \code{USE_STACKCHECK} is
+defined (currently on Windows using the Microsoft Visual C++ compiler
+and on the Macintosh). \code{USE_CHECKSTACK} will be defined
+automatically; you should never change the definition in your own
+code.
+\end{cfuncdesc}
+
\section{Process Control \label{processControl}}