Document PyErr_WarnExplicit().
diff --git a/Doc/api/api.tex b/Doc/api/api.tex
index 7cda0d5..7a11660 100644
--- a/Doc/api/api.tex
+++ b/Doc/api/api.tex
@@ -980,6 +980,15 @@
line documentation. There is no C API for warning control.
\end{cfuncdesc}
+\begin{cfuncdesc}{int}{PyErr_WarnExplicit}{PyObject *category, char *message,
+char *filename, int lineno, char *module, PyObject *registry}
+Issue a warning message with explicit control over all warning
+attributes. This is a straightforward wrapper around the Python
+function \function{warnings.warn_explicit()}, see there for more
+information. The \var{module} and \var{registry} arguments may be
+set to \code{NULL} to get the default effect described there.
+\end{cfuncdesc}
+
\begin{cfuncdesc}{int}{PyErr_CheckSignals}{}
This function interacts with Python's signal handling. It checks
whether a signal has been sent to the processes and if so, invokes the