Change ignored extension .tar.gz to .tgz.
diff --git a/Doc/.cvsignore b/Doc/.cvsignore
index 529febf..0502467 100755
--- a/Doc/.cvsignore
+++ b/Doc/.cvsignore
@@ -11,4 +11,4 @@
 *.pdf
 *.out
 *.bkm
-*.tar.gz
+*.tgz