Markup fix.
diff --git a/Doc/lib/libgc.tex b/Doc/lib/libgc.tex
index 51af5ad..2477584 100644
--- a/Doc/lib/libgc.tex
+++ b/Doc/lib/libgc.tex
@@ -102,8 +102,8 @@
\begin{funcdesc}{get_referents}{*objs}
Return a list of objects directly referred to by any of the arguments.
The referents returned are those objects visited by the arguments'
-C-level \cfunction{tp_traverse} methods (if any), and may not be all
-objects actually directly reachable. \cfunction{tp_traverse} methods
+C-level \member{tp_traverse} methods (if any), and may not be all
+objects actually directly reachable. \member{tp_traverse} methods
are supported only by objects that support garbage collection, and are
only required to visit objects that may be involved in a cycle. So,
for example, if an integer is directly reachable from an argument, that