Do not backup

Author: gracjan

doc/deploy-manual.sh

@@ -46,7 +46,7 @@ git clone --quiet --branch=gh-pages "[email protected]:haskell/haskell-mode.git" gh
 cd gh-pages-deploy
 git rm -qr manual/latest
 cp -r ../html manual/latest
-find manual/latest -name '*.html' -exec sed -i bak -e '/^<\/head>$/i\
+find manual/latest -name '*.html' -exec sed -i -e '/^<\/head>$/i\
 <script src="../../index.js"> </script>
 ' \{} \;
 git add manual/latest