manual: define li.box's margin-left (cosmetics)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@62103 15284696-431f-4ddb-bdfa-cd5b030d7da7

man/grassdocs.css

@@ -114,6 +114,7 @@ td.box {
 }
 
 li.box {
+    margin-left: -20px;
     color: rgb(25%, 60%, 25%);
 }