Correct markup error.
diff --git a/Doc/lib/libreadline.tex b/Doc/lib/libreadline.tex
index 4681ee5..f59ddac 100644
--- a/Doc/lib/libreadline.tex
+++ b/Doc/lib/libreadline.tex
@@ -49,8 +49,9 @@
\begin{funcdesc}{set_history_length}{length}
Set the number of lines to save in the history file.
-\func{write_history_file} uses this value to truncate the history file when
-saving. Negative values imply unlimited history file size.
+\function{write_history_file()} uses this value to truncate the
+history file when saving. Negative values imply unlimited history
+file size.
\end{funcdesc}
\begin{funcdesc}{set_completer}{\optional{function}}