fix typo in markup

Doc/lib/libpyclbr.tex

@@ -68,7 +68,7 @@ provide the following data members:
 \end{memberdesc}
 
 \begin{memberdesc}[class descriptor]{file}
-  Name of the file containing the \code(class} statement defining the class.
+  Name of the file containing the \code{class} statement defining the class.
 \end{memberdesc}
 
 \begin{memberdesc}[class descriptor]{lineno}