SF patch #819955:  Erroneous \seemodule in tarfile docs
(Contributed by Johannes Gijsbers.)
diff --git a/Doc/lib/libtarfile.tex b/Doc/lib/libtarfile.tex
index a05a9f4..10ecc77 100644
--- a/Doc/lib/libtarfile.tex
+++ b/Doc/lib/libtarfile.tex
@@ -125,7 +125,7 @@
 \end{excdesc}
 
 \begin{seealso}
-    \seemodule[module-zipfile]{zipfile}{Documentation of the \code{zipfile}
+    \seemodule{zipfile}{Documentation of the \code{zipfile}
     standard module.}
 
     \seetitle[http://www.gnu.org/manual/tar/html_chapter/tar_8.html\#SEC118]